20356717354 has 16 divisors (see below), whose sum is σ = 32446330056. Its totient is φ = 9545536000.

The previous prime is 20356717327. The next prime is 20356717379. The reversal of 20356717354 is 45371765302.

It can be written as a sum of positive squares in 4 ways, for example, as 16881025329 + 3475692025 = 129927^2 + 58955^2 .

It is a super-2 number, since 2×20356717354² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20356717354.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055797 + ... + 1074904.

Almost surely, 2^20356717354 is an apocalyptic number.

20356717354 is a deficient number, since it is larger than the sum of its proper divisors (12089612702).

20356717354 is a wasteful number, since it uses less digits than its factorization.

20356717354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131001.

The product of its (nonzero) digits is 529200, while the sum is 43.

The spelling of 20356717354 in words is "twenty billion, three hundred fifty-six million, seven hundred seventeen thousand, three hundred fifty-four".