20104717356 has 36 divisors (see below), whose sum is σ = 50938209504. Its totient is φ = 6686018400.

The previous prime is 20104717313. The next prime is 20104717357. The reversal of 20104717356 is 65371740102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20104717356.

It is not an unprimeable number, because it can be changed into a prime (20104717357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 632355 + ... + 663386.

It is an arithmetic number, because the mean of its divisors is an integer number (1414950264).

Almost surely, 2^20104717356 is an apocalyptic number.

It is an amenable number.

20104717356 is an abundant number, since it is smaller than the sum of its proper divisors (30833492148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20104717356 is a wasteful number, since it uses less digits than its factorization.

20104717356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296182 (or 1296177 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 20104717356 in words is "twenty billion, one hundred four million, seven hundred seventeen thousand, three hundred fifty-six".