20122139973 has 24 divisors (see below), whose sum is σ = 30315235392. Its totient is φ = 11844463488.

The previous prime is 20122139963. The next prime is 20122139987. The reversal of 20122139973 is 37993122102.

It is not a de Polignac number, because 20122139973 - 2⁴ = 20122139957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122139963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 851136 + ... + 874457.

It is an arithmetic number, because the mean of its divisors is an integer number (1263134808).

Almost surely, 2^20122139973 is an apocalyptic number.

20122139973 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20122139973 is a deficient number, since it is larger than the sum of its proper divisors (10193095419).

20122139973 is a wasteful number, since it uses less digits than its factorization.

20122139973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725645 (or 1725632 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The spelling of 20122139973 in words is "twenty billion, one hundred twenty-two million, one hundred thirty-nine thousand, nine hundred seventy-three".