20387632265 has 32 divisors (see below), whose sum is σ = 32848333056. Its totient is φ = 11731541760.

The previous prime is 20387632253. The next prime is 20387632277. The reversal of 20387632265 is 56223678302.

It is an interprime number because it is at equal distance from previous prime (20387632253) and next prime (20387632277).

It is not a de Polignac number, because 20387632265 - 2⁶ = 20387632201 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2031722 + ... + 2041731.

It is an arithmetic number, because the mean of its divisors is an integer number (1026510408).

Almost surely, 2^20387632265 is an apocalyptic number.

It is an amenable number.

20387632265 is a deficient number, since it is larger than the sum of its proper divisors (12460700791).

20387632265 is a wasteful number, since it uses less digits than its factorization.

20387632265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073489.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 20387632265 in words is "twenty billion, three hundred eighty-seven million, six hundred thirty-two thousand, two hundred sixty-five".