20694873123 has 12 divisors (see below), whose sum is σ = 30621682728. Its totient is φ = 13460079840.

The previous prime is 20694873113. The next prime is 20694873127. The reversal of 20694873123 is 32137849602.

It is not a de Polignac number, because 20694873123 - 2⁵ = 20694873091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20694873127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28041465 + ... + 28042202.

It is an arithmetic number, because the mean of its divisors is an integer number (2551806894).

Almost surely, 2^20694873123 is an apocalyptic number.

20694873123 is a deficient number, since it is larger than the sum of its proper divisors (9926809605).

20694873123 is a wasteful number, since it uses less digits than its factorization.

20694873123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56083714 (or 56083711 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 20694873123 in words is "twenty billion, six hundred ninety-four million, eight hundred seventy-three thousand, one hundred twenty-three".