20632720365 has 24 divisors (see below), whose sum is σ = 36253297080. Its totient is φ = 10853374464.

The previous prime is 20632720291. The next prime is 20632720379. The reversal of 20632720365 is 56302723602.

It is a happy number.

20632720365 is a `hidden beast` number, since 20 + 6 + 3 + 272 + 0 + 365 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6815658249 + 13817062116 = 82557^2 + 117546^2 .

It is not a de Polignac number, because 20632720365 - 2⁷ = 20632720237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3137160 + ... + 3143729.

It is an arithmetic number, because the mean of its divisors is an integer number (1510554045).

Almost surely, 2^20632720365 is an apocalyptic number.

It is an amenable number.

20632720365 is a deficient number, since it is larger than the sum of its proper divisors (15620576715).

20632720365 is a wasteful number, since it uses less digits than its factorization.

20632720365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6280973 (or 6280970 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The spelling of 20632720365 in words is "twenty billion, six hundred thirty-two million, seven hundred twenty thousand, three hundred sixty-five".