22478607900538 has 4 divisors (see below), whose sum is σ = 33717911850810. Its totient is φ = 11239303950268.

The previous prime is 22478607900523. The next prime is 22478607900571. The reversal of 22478607900538 is 83500970687422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22214980078729 + 263627821809 = 4713277^2 + 513447^2 .

It is a super-2 number, since 2×22478607900538² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5619651975133 + ... + 5619651975136.

Almost surely, 2^{22478607900538} is an apocalyptic number.

22478607900538 is a deficient number, since it is larger than the sum of its proper divisors (11239303950272).

22478607900538 is a wasteful number, since it uses less digits than its factorization.

22478607900538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11239303950271.

The product of its (nonzero) digits is 40642560, while the sum is 61.

The spelling of 22478607900538 in words is "twenty-two trillion, four hundred seventy-eight billion, six hundred seven million, nine hundred thousand, five hundred thirty-eight".