21372490080 has 144 divisors (see below), whose sum is σ = 73218678624. Its totient is φ = 5677056000.

The previous prime is 21372490039. The next prime is 21372490091. The reversal of 21372490080 is 8009427312.

21372490080 is a `hidden beast` number, since 21 + 3 + 72 + 490 + 0 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 341205 + ... + 398955.

It is an arithmetic number, because the mean of its divisors is an integer number (508463046).

Almost surely, 2^21372490080 is an apocalyptic number.

21372490080 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 21372490080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36609339312).

21372490080 is an abundant number, since it is smaller than the sum of its proper divisors (51846188544).

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

21372490080 is a wasteful number, since it uses less digits than its factorization.

21372490080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58029 (or 58018 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 21372490080 in words is "twenty-one billion, three hundred seventy-two million, four hundred ninety thousand, eighty".