20510507072 has 56 divisors (see below), whose sum is σ = 47012412960. Its totient is φ = 8774543360.

The previous prime is 20510507041. The next prime is 20510507099. The reversal of 20510507072 is 27070501502.

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, 844922 + ... + 868857.

Almost surely, 2^20510507072 is an apocalyptic number.

20510507072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20510507072 is an abundant number, since it is smaller than the sum of its proper divisors (26501905888).

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

20510507072 is a wasteful number, since it uses less digits than its factorization.

20510507072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713819 (or 1713809 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 29.

The spelling of 20510507072 in words is "twenty billion, five hundred ten million, five hundred seven thousand, seventy-two".