19893974116 has 27 divisors (see below), whose sum is σ = 35191174809. Its totient is φ = 9840497328.

The previous prime is 19893974101. The next prime is 19893974119. The reversal of 19893974116 is 61147939891.

The square root of 19893974116 is 141046.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 13866004516 + 6027969600 = 117754^2 + 77640^2 .

It is a super-2 number, since 2×19893974116² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19893974119) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30747705 + ... + 30748351.

Almost surely, 2^19893974116 is an apocalyptic number.

19893974116 is the 141046-th square number.

It is an amenable number.

19893974116 is a deficient number, since it is larger than the sum of its proper divisors (15297200693).

19893974116 is an frugal number, since it uses more digits than its factorization.

19893974116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516 (or 758 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 58.

It can be divided in two parts, 19893 and 974116, that added together give a square (994009 = 997²).

The spelling of 19893974116 in words is "nineteen billion, eight hundred ninety-three million, nine hundred seventy-four thousand, one hundred sixteen".