20408490935 has 24 divisors (see below), whose sum is σ = 28606880016. Its totient is φ = 13936285440.

The previous prime is 20408490931. The next prime is 20408491009. The reversal of 20408490935 is 53909480402.

It is not a de Polignac number, because 20408490935 - 2² = 20408490931 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20408490931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113777 + ... + 231866.

It is an arithmetic number, because the mean of its divisors is an integer number (1191953334).

Almost surely, 2^20408490935 is an apocalyptic number.

20408490935 is a deficient number, since it is larger than the sum of its proper divisors (8198389081).

20408490935 is a wasteful number, since it uses less digits than its factorization.

20408490935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345903 (or 345896 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 20408490935 in words is "twenty billion, four hundred eight million, four hundred ninety thousand, nine hundred thirty-five".