20007149720 has 64 divisors (see below), whose sum is σ = 50172760800. Its totient is φ = 7135672320.

The previous prime is 20007149707. The next prime is 20007149753. The reversal of 20007149720 is 2794170002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 761351 + ... + 787190.

Almost surely, 2^20007149720 is an apocalyptic number.

20007149720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20007149720 is an abundant number, since it is smaller than the sum of its proper divisors (30165611080).

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

20007149720 is a wasteful number, since it uses less digits than its factorization.

20007149720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548588 (or 1548584 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The spelling of 20007149720 in words is "twenty billion, seven million, one hundred forty-nine thousand, seven hundred twenty".