21473047080 has 128 divisors (see below), whose sum is σ = 72645379200. Its totient is φ = 5640662016.

The previous prime is 21473047073. The next prime is 21473047091. The reversal of 21473047080 is 8074037412.

It is a happy number.

It is a super-2 number, since 2×21473047080² (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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76017 + ... + 220736.

It is an arithmetic number, because the mean of its divisors is an integer number (567542025).

Almost surely, 2^21473047080 is an apocalyptic number.

21473047080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21473047080 is an abundant number, since it is smaller than the sum of its proper divisors (51172332120).

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

21473047080 is a wasteful number, since it uses less digits than its factorization.

21473047080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296840 (or 296830 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The spelling of 21473047080 in words is "twenty-one billion, four hundred seventy-three million, forty-seven thousand, eighty".