21607018488 has 128 divisors (see below), whose sum is σ = 65530425600. Its totient is φ = 6542121600.

The previous prime is 21607018463. The next prime is 21607018493. The reversal of 21607018488 is 88481070612.

21607018488 is a `hidden beast` number, since 2 + 160 + 7 + 0 + 1 + 8 + 488 = 666.

It is a super-2 number, since 2×21607018488² (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 31 ways as a sum of consecutive naturals, for example, 3544323 + ... + 3550413.

It is an arithmetic number, because the mean of its divisors is an integer number (511956450).

Almost surely, 2^21607018488 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 21607018488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32765212800).

21607018488 is an abundant number, since it is smaller than the sum of its proper divisors (43923407112).

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

21607018488 is a wasteful number, since it uses less digits than its factorization.

21607018488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7610 (or 7600 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The spelling of 21607018488 in words is "twenty-one billion, six hundred seven million, eighteen thousand, four hundred eighty-eight".