20452513720 has 32 divisors (see below), whose sum is σ = 46060588800. Its totient is φ = 8173461888.

The previous prime is 20452513703. The next prime is 20452513787. The reversal of 20452513720 is 2731525402.

It is a congruent number.

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, 191715 + ... + 278674.

It is an arithmetic number, because the mean of its divisors is an integer number (1439393400).

Almost surely, 2^20452513720 is an apocalyptic number.

20452513720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20452513720 is an abundant number, since it is smaller than the sum of its proper divisors (25608075080).

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

20452513720 is a wasteful number, since it uses less digits than its factorization.

20452513720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471487 (or 471483 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The spelling of 20452513720 in words is "twenty billion, four hundred fifty-two million, five hundred thirteen thousand, seven hundred twenty".