21227045160 has 32 divisors (see below), whose sum is σ = 63681135840. Its totient is φ = 5660545344.

The previous prime is 21227045153. The next prime is 21227045179. The reversal of 21227045160 is 6154072212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88445902 + ... + 88446141.

It is an arithmetic number, because the mean of its divisors is an integer number (1990035495).

Almost surely, 2^21227045160 is an apocalyptic number.

21227045160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21227045160 is an abundant number, since it is smaller than the sum of its proper divisors (42454090680).

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

21227045160 is a wasteful number, since it uses less digits than its factorization.

21227045160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176892057 (or 176892053 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The spelling of 21227045160 in words is "twenty-one billion, two hundred twenty-seven million, forty-five thousand, one hundred sixty".