21141672538 has 16 divisors (see below), whose sum is σ = 36266033664. Its totient is φ = 9054925200.

The previous prime is 21141672527. The next prime is 21141672553. The reversal of 21141672538 is 83527614112.

It is a super-2 number, since 2×21141672538² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21141672538.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459913 + ... + 503788.

It is an arithmetic number, because the mean of its divisors is an integer number (2266627104).

Almost surely, 2^21141672538 is an apocalyptic number.

21141672538 is a deficient number, since it is larger than the sum of its proper divisors (15124361126).

21141672538 is a wasteful number, since it uses less digits than its factorization.

21141672538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965277.

The product of its digits is 80640, while the sum is 40.

The spelling of 21141672538 in words is "twenty-one billion, one hundred forty-one million, six hundred seventy-two thousand, five hundred thirty-eight".