21472654500 has 480 divisors, whose sum is σ = 77160859776. Its totient is φ = 5155488000.

The previous prime is 21472654477. The next prime is 21472654517. The reversal of 21472654500 is 545627412.

It is a happy number.

21472654500 is a `hidden beast` number, since 2 + 147 + 2 + 6 + 5 + 4 + 500 = 666.

It is a super-2 number, since 2×21472654500² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 69943347 + ... + 69943653.

Almost surely, 2^21472654500 is an apocalyptic number.

21472654500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21472654500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38580429888).

21472654500 is an abundant number, since it is smaller than the sum of its proper divisors (55688205276).

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

21472654500 is a wasteful number, since it uses less digits than its factorization.

21472654500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The spelling of 21472654500 in words is "twenty-one billion, four hundred seventy-two million, six hundred fifty-four thousand, five hundred".