22578036381 has 6 divisors (see below), whose sum is σ = 32612719230. Its totient is φ = 15052024248.

The previous prime is 22578036307. The next prime is 22578036389. The reversal of 22578036381 is 18363087522.

22578036381 is a `hidden beast` number, since 2 + 2 + 5 + 7 + 8 + 0 + 3 + 638 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16187472900 + 6390563481 = 127230^2 + 79941^2 .

It is not a de Polignac number, because 22578036381 - 2¹⁹ = 22577512093 is a prime.

It is a super-2 number, since 2×22578036381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22578036389) 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, 1254335346 + ... + 1254335363.

It is an arithmetic number, because the mean of its divisors is an integer number (5435453205).

Almost surely, 2^22578036381 is an apocalyptic number.

It is an amenable number.

22578036381 is a deficient number, since it is larger than the sum of its proper divisors (10034682849).

22578036381 is a wasteful number, since it uses less digits than its factorization.

22578036381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508670715 (or 2508670712 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 22578036381 in words is "twenty-two billion, five hundred seventy-eight million, thirty-six thousand, three hundred eighty-one".