20422691901 has 6 divisors (see below), whose sum is σ = 29499443870. Its totient is φ = 13615127928.

The previous prime is 20422691893. The next prime is 20422691911. The reversal of 20422691901 is 10919622402.

20422691901 is a `hidden beast` number, since 204 + 2 + 269 + 190 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14556663801 + 5866028100 = 120651^2 + 76590^2 .

It is not a de Polignac number, because 20422691901 - 2³ = 20422691893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422691911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1134593986 + ... + 1134594003.

Almost surely, 2^20422691901 is an apocalyptic number.

It is an amenable number.

20422691901 is a deficient number, since it is larger than the sum of its proper divisors (9076751969).

20422691901 is a wasteful number, since it uses less digits than its factorization.

20422691901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269187995 (or 2269187992 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 20422691901 in words is "twenty billion, four hundred twenty-two million, six hundred ninety-one thousand, nine hundred one".