21602463456 has 48 divisors (see below), whose sum is σ = 64807392384. Its totient is φ = 6172132224.

The previous prime is 21602463439. The next prime is 21602463469. The reversal of 21602463456 is 65436420612.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-3 number, since 3×21602463456³ (a number of 32 digits) contains 333 as substring.

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, 16072590 + ... + 16073933.

It is an arithmetic number, because the mean of its divisors is an integer number (1350154008).

Almost surely, 2^21602463456 is an apocalyptic number.

It is an amenable number.

21602463456 is an abundant number, since it is smaller than the sum of its proper divisors (43204928928).

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

21602463456 is a wasteful number, since it uses less digits than its factorization.

21602463456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32146543 (or 32146535 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 21602463456 in words is "twenty-one billion, six hundred two million, four hundred sixty-three thousand, four hundred fifty-six".