21262453492 has 48 divisors (see below), whose sum is σ = 42931582848. Its totient is φ = 9025752960.

The previous prime is 21262453483. The next prime is 21262453501. The reversal of 21262453492 is 29435426212.

It is an interprime number because it is at equal distance from previous prime (21262453483) and next prime (21262453501).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1243642 + ... + 1260622.

It is an arithmetic number, because the mean of its divisors is an integer number (894407976).

Almost surely, 2^21262453492 is an apocalyptic number.

It is an amenable number.

21262453492 is an abundant number, since it is smaller than the sum of its proper divisors (21669129356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21262453492 is a wasteful number, since it uses less digits than its factorization.

21262453492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17416 (or 17414 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The spelling of 21262453492 in words is "twenty-one billion, two hundred sixty-two million, four hundred fifty-three thousand, four hundred ninety-two".