21453605514 has 32 divisors (see below), whose sum is σ = 52008742080. Its totient is φ = 6501092400.

The previous prime is 21453605497. The next prime is 21453605531. The reversal of 21453605514 is 41550635412.

21453605514 is a `hidden beast` number, since 2 + 1 + 45 + 3 + 60 + 551 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (21453605497) and next prime (21453605531).

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, 18057997 + ... + 18059184.

It is an arithmetic number, because the mean of its divisors is an integer number (1625273190).

Almost surely, 2^21453605514 is an apocalyptic number.

21453605514 is an abundant number, since it is smaller than the sum of its proper divisors (30555136566).

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

21453605514 is a wasteful number, since it uses less digits than its factorization.

21453605514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36117203 (or 36117197 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 21453605514 in words is "twenty-one billion, four hundred fifty-three million, six hundred five thousand, five hundred fourteen".