20294973861 has 16 divisors (see below), whose sum is σ = 28502476800. Its totient is φ = 12809641968.

The previous prime is 20294973857. The next prime is 20294973911. The reversal of 20294973861 is 16837949202.

It is not a de Polignac number, because 20294973861 - 2² = 20294973857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20294973821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24291 + ... + 202928.

It is an arithmetic number, because the mean of its divisors is an integer number (1781404800).

Almost surely, 2^20294973861 is an apocalyptic number.

It is an amenable number.

20294973861 is a deficient number, since it is larger than the sum of its proper divisors (8207502939).

20294973861 is a wasteful number, since it uses less digits than its factorization.

20294973861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228808.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 20294973861 in words is "twenty billion, two hundred ninety-four million, nine hundred seventy-three thousand, eight hundred sixty-one".