21534044726 has 16 divisors (see below), whose sum is σ = 32711974848. Its totient is φ = 10630225800.

The previous prime is 21534044713. The next prime is 21534044761. The reversal of 21534044726 is 62744043512.

It is a happy number.

It is a super-2 number, since 2×21534044726² (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 21534044726.

It is a congruent number.

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, 211781 + ... + 296511.

It is an arithmetic number, because the mean of its divisors is an integer number (2044498428).

Almost surely, 2^21534044726 is an apocalyptic number.

21534044726 is a deficient number, since it is larger than the sum of its proper divisors (11177930122).

21534044726 is a wasteful number, since it uses less digits than its factorization.

21534044726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86347.

The product of its (nonzero) digits is 161280, while the sum is 38.

The spelling of 21534044726 in words is "twenty-one billion, five hundred thirty-four million, forty-four thousand, seven hundred twenty-six".