21426054652 has 12 divisors (see below), whose sum is σ = 39701219040. Its totient is φ = 10082849216.

The previous prime is 21426054649. The next prime is 21426054677. The reversal of 21426054652 is 25645062412.

It is a happy number.

It is a super-2 number, since 2×21426054652² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157544452 + ... + 157544587.

It is an arithmetic number, because the mean of its divisors is an integer number (3308434920).

Almost surely, 2^21426054652 is an apocalyptic number.

It is an amenable number.

21426054652 is a deficient number, since it is larger than the sum of its proper divisors (18275164388).

21426054652 is a wasteful number, since it uses less digits than its factorization.

21426054652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315089060 (or 315089058 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 21426054652 in words is "twenty-one billion, four hundred twenty-six million, fifty-four thousand, six hundred fifty-two".