20067621431 has 16 divisors (see below), whose sum is σ = 23770809888. Its totient is φ = 16839947520.

The previous prime is 20067621361. The next prime is 20067621449. The reversal of 20067621431 is 13412676002.

It is a de Polignac number, because none of the positive numbers 2^k-20067621431 is a prime.

It is a super-2 number, since 2×20067621431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20067641431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 562586 + ... + 597191.

It is an arithmetic number, because the mean of its divisors is an integer number (1485675618).

Almost surely, 2^20067621431 is an apocalyptic number.

20067621431 is a deficient number, since it is larger than the sum of its proper divisors (3703188457).

20067621431 is a wasteful number, since it uses less digits than its factorization.

20067621431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159823 (or 1159801 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 20067621431 in words is "twenty billion, sixty-seven million, six hundred twenty-one thousand, four hundred thirty-one".