20994841512 has 48 divisors (see below), whose sum is σ = 58695262080. Its totient is φ = 6772528800.

The previous prime is 20994841493. The next prime is 20994841541. The reversal of 20994841512 is 21514849902.

It is a happy number.

20994841512 is a `hidden beast` number, since 2 + 0 + 9 + 94 + 8 + 41 + 512 = 666.

It is a super-2 number, since 2×20994841512² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4700914 + ... + 4705377.

It is an arithmetic number, because the mean of its divisors is an integer number (1222817960).

Almost surely, 2^20994841512 is an apocalyptic number.

It is an amenable number.

20994841512 is an abundant number, since it is smaller than the sum of its proper divisors (37700420568).

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

20994841512 is a wasteful number, since it uses less digits than its factorization.

20994841512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9406334 (or 9406327 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 20994841512 in words is "twenty billion, nine hundred ninety-four million, eight hundred forty-one thousand, five hundred twelve".