20994662983 has 32 divisors (see below), whose sum is σ = 25406627840. Its totient is φ = 16971120000.

The previous prime is 20994662977. The next prime is 20994663007. The reversal of 20994662983 is 38926649902.

It is a cyclic number.

It is not a de Polignac number, because 20994662983 - 2²¹ = 20992565831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20994662903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1435558 + ... + 1450108.

It is an arithmetic number, because the mean of its divisors is an integer number (793957120).

Almost surely, 2^20994662983 is an apocalyptic number.

20994662983 is a deficient number, since it is larger than the sum of its proper divisors (4411964857).

20994662983 is a wasteful number, since it uses less digits than its factorization.

20994662983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14759.

The product of its (nonzero) digits is 10077696, while the sum is 58.

The spelling of 20994662983 in words is "twenty billion, nine hundred ninety-four million, six hundred sixty-two thousand, nine hundred eighty-three".