21332525454 has 48 divisors (see below), whose sum is σ = 49106603520. Its totient is φ = 6680076480.

The previous prime is 21332525419. The next prime is 21332525477. The reversal of 21332525454 is 45452523312.

21332525454 is a `hidden beast` number, since 21 + 332 + 5 + 254 + 54 = 666.

It is a super-2 number, since 2×21332525454² (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 23 ways as a sum of consecutive naturals, for example, 532942 + ... + 571569.

It is an arithmetic number, because the mean of its divisors is an integer number (1023054240).

Almost surely, 2^21332525454 is an apocalyptic number.

21332525454 is an abundant number, since it is smaller than the sum of its proper divisors (27774078066).

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

21332525454 is a wasteful number, since it uses less digits than its factorization.

21332525454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104585 (or 1104582 counting only the distinct ones).

The product of its digits is 144000, while the sum is 36.

The spelling of 21332525454 in words is "twenty-one billion, three hundred thirty-two million, five hundred twenty-five thousand, four hundred fifty-four".