20264612381 has 24 divisors (see below), whose sum is σ = 22506926976. Its totient is φ = 18230097600.

The previous prime is 20264612359. The next prime is 20264612411. The reversal of 20264612381 is 18321646202.

It is a de Polignac number, because none of the positive numbers 2^k-20264612381 is a prime.

It is a super-2 number, since 2×20264612381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20264612311) 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, 1345016 + ... + 1359998.

It is an arithmetic number, because the mean of its divisors is an integer number (937788624).

Almost surely, 2^20264612381 is an apocalyptic number.

It is an amenable number.

20264612381 is a deficient number, since it is larger than the sum of its proper divisors (2242314595).

20264612381 is a wasteful number, since it uses less digits than its factorization.

20264612381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15213 (or 15200 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 20264612381 in words is "twenty billion, two hundred sixty-four million, six hundred twelve thousand, three hundred eighty-one".