21472654723996 has 144 divisors (see below), whose sum is σ = 45721896450048. Its totient is φ = 8641131206400.

The previous prime is 21472654723987. The next prime is 21472654724011. The reversal of 21472654723996 is 69932745627412.

It is a super-2 number, since 2×21472654723996² (a number of 27 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 47 ways as a sum of consecutive naturals, for example, 244991101 + ... + 245078731.

It is an arithmetic number, because the mean of its divisors is an integer number (317513169792).

Almost surely, 2^{21472654723996} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21472654723996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22860948225024).

21472654723996 is an abundant number, since it is smaller than the sum of its proper divisors (24249241726052).

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

21472654723996 is a wasteful number, since it uses less digits than its factorization.

21472654723996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87992 (or 87967 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 67.

The spelling of 21472654723996 in words is "twenty-one trillion, four hundred seventy-two billion, six hundred fifty-four million, seven hundred twenty-three thousand, nine hundred ninety-six".