20436437652 has 12 divisors (see below), whose sum is σ = 47685021216. Its totient is φ = 6812145880.

The previous prime is 20436437627. The next prime is 20436437711. The reversal of 20436437652 is 25673463402.

It is a tau number, because it is divible by the number of its divisors (12).

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, 851518224 + ... + 851518247.

It is an arithmetic number, because the mean of its divisors is an integer number (3973751768).

Almost surely, 2^20436437652 is an apocalyptic number.

It is an amenable number.

20436437652 is an abundant number, since it is smaller than the sum of its proper divisors (27248583564).

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

20436437652 is a wasteful number, since it uses less digits than its factorization.

20436437652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703036478 (or 1703036476 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 42.

The spelling of 20436437652 in words is "twenty billion, four hundred thirty-six million, four hundred thirty-seven thousand, six hundred fifty-two".