20602540456 has 16 divisors (see below), whose sum is σ = 38933936640. Its totient is φ = 10220157360.

The previous prime is 20602540451. The next prime is 20602540477. The reversal of 20602540456 is 65404520602.

It is a super-2 number, since 2×20602540456² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20602540451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10138030 + ... + 10140061.

It is an arithmetic number, because the mean of its divisors is an integer number (2433371040).

Almost surely, 2^20602540456 is an apocalyptic number.

It is an amenable number.

20602540456 is a deficient number, since it is larger than the sum of its proper divisors (18331396184).

20602540456 is a wasteful number, since it uses less digits than its factorization.

20602540456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20278224 (or 20278220 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The spelling of 20602540456 in words is "twenty billion, six hundred two million, five hundred forty thousand, four hundred fifty-six".