20157211373 has 4 divisors (see below), whose sum is σ = 21707766108. Its totient is φ = 18606656640.

The previous prime is 20157211363. The next prime is 20157211387. The reversal of 20157211373 is 37311275102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13470387844 + 6686823529 = 116062^2 + 81773^2 .

It is not a de Polignac number, because 20157211373 - 2¹⁰ = 20157210349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20157211303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775277348 + ... + 775277373.

It is an arithmetic number, because the mean of its divisors is an integer number (5426941527).

Almost surely, 2^20157211373 is an apocalyptic number.

It is an amenable number.

20157211373 is a deficient number, since it is larger than the sum of its proper divisors (1550554735).

20157211373 is a wasteful number, since it uses less digits than its factorization.

20157211373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550554734.

The product of its (nonzero) digits is 8820, while the sum is 32.

Adding to 20157211373 its reverse (37311275102), we get a palindrome (57468486475).

The spelling of 20157211373 in words is "twenty billion, one hundred fifty-seven million, two hundred eleven thousand, three hundred seventy-three".