20251606995 has 48 divisors (see below), whose sum is σ = 36671910912. Its totient is φ = 10326450240.

The previous prime is 20251606979. The next prime is 20251607009. The reversal of 20251606995 is 59960615202.

It is a happy number.

It is not a de Polignac number, because 20251606995 - 2⁴ = 20251606979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20251606995.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28332 + ... + 203238.

It is an arithmetic number, because the mean of its divisors is an integer number (763998144).

Almost surely, 2^20251606995 is an apocalyptic number.

20251606995 is a deficient number, since it is larger than the sum of its proper divisors (16420303917).

20251606995 is a wasteful number, since it uses less digits than its factorization.

20251606995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175032 (or 175029 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 20251606995 in words is "twenty billion, two hundred fifty-one million, six hundred six thousand, nine hundred ninety-five".