20412138637 has 4 divisors (see below), whose sum is σ = 22267787616. Its totient is φ = 18556489660.

The previous prime is 20412138611. The next prime is 20412138701. The reversal of 20412138637 is 73683121402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20412138637 is a prime.

It is a super-2 number, since 2×20412138637² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20412138596 and 20412138605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20412138037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 927824473 + ... + 927824494.

It is an arithmetic number, because the mean of its divisors is an integer number (5566946904).

Almost surely, 2^20412138637 is an apocalyptic number.

It is an amenable number.

20412138637 is a deficient number, since it is larger than the sum of its proper divisors (1855648979).

20412138637 is a wasteful number, since it uses less digits than its factorization.

20412138637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855648978.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 20412138637 in words is "twenty billion, four hundred twelve million, one hundred thirty-eight thousand, six hundred thirty-seven".