20973393057 has 16 divisors (see below), whose sum is σ = 29004697152. Its totient is φ = 13469659200.

The previous prime is 20973393043. The next prime is 20973393071. The reversal of 20973393057 is 75039337902.

It is an interprime number because it is at equal distance from previous prime (20973393043) and next prime (20973393071).

It is not a de Polignac number, because 20973393057 - 2¹⁴ = 20973376673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20973392997 and 20973393015.

It is not an unprimeable number, because it can be changed into a prime (20973393097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924183 + ... + 946604.

It is an arithmetic number, because the mean of its divisors is an integer number (1812793572).

Almost surely, 2^20973393057 is an apocalyptic number.

It is an amenable number.

20973393057 is a deficient number, since it is larger than the sum of its proper divisors (8031304095).

20973393057 is a wasteful number, since it uses less digits than its factorization.

20973393057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870928.

The product of its (nonzero) digits is 1071630, while the sum is 48.

The spelling of 20973393057 in words is "twenty billion, nine hundred seventy-three million, three hundred ninety-three thousand, fifty-seven".