20565424331512 has 16 divisors (see below), whose sum is σ = 38573527149360. Its totient is φ = 10279150425024.

The previous prime is 20565424331423. The next prime is 20565424331533. The reversal of 20565424331512 is 21513342456502.

It is a super-2 number, since 2×20565424331512² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445193053 + ... + 445239244.

It is an arithmetic number, because the mean of its divisors is an integer number (2410845446835).

Almost surely, 2^{20565424331512} is an apocalyptic number.

It is an amenable number.

20565424331512 is a deficient number, since it is larger than the sum of its proper divisors (18008102817848).

20565424331512 is a wasteful number, since it uses less digits than its factorization.

20565424331512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890435190 (or 890435186 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 20565424331512 in words is "twenty trillion, five hundred sixty-five billion, four hundred twenty-four million, three hundred thirty-one thousand, five hundred twelve".