20487165236 has 6 divisors (see below), whose sum is σ = 35852539170. Its totient is φ = 10243582616.

The previous prime is 20487165161. The next prime is 20487165263. The reversal of 20487165236 is 63256178402.

It can be written as a sum of positive squares in only one way, i.e., 20303400100 + 183765136 = 142490^2 + 13556^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2560895651 + ... + 2560895658.

It is an arithmetic number, because the mean of its divisors is an integer number (5975423195).

Almost surely, 2^20487165236 is an apocalyptic number.

It is an amenable number.

20487165236 is a deficient number, since it is larger than the sum of its proper divisors (15365373934).

20487165236 is a wasteful number, since it uses less digits than its factorization.

20487165236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5121791313 (or 5121791311 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 20487165236 in words is "twenty billion, four hundred eighty-seven million, one hundred sixty-five thousand, two hundred thirty-six".