20951494789032 has 48 divisors (see below), whose sum is σ = 56745759856500. Its totient is φ = 6983569671936.

The previous prime is 20951494789021. The next prime is 20951494789051. The reversal of 20951494789032 is 23098749415902.

20951494789032 is a `hidden beast` number, since 2 + 0 + 9 + 5 + 1 + 49 + 478 + 90 + 32 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19816617915396 + 1134876873636 = 4451586^2 + 1065306^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3518907 + ... + 7367882.

Almost surely, 2^{20951494789032} is an apocalyptic number.

It is an amenable number.

20951494789032 is an abundant number, since it is smaller than the sum of its proper divisors (35794265067468).

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

20951494789032 is a wasteful number, since it uses less digits than its factorization.

20951494789032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10913530 (or 10913523 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 20951494789032 in words is "twenty trillion, nine hundred fifty-one billion, four hundred ninety-four million, seven hundred eighty-nine thousand, thirty-two".