2021216533464 has 32 divisors (see below), whose sum is σ = 5054160276720. Its totient is φ = 673589652096.

The previous prime is 2021216533459. The next prime is 2021216533601. The reversal of 2021216533464 is 4643356121202.

It is a congruent number.

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, 9213859 + ... + 9430674.

Almost surely, 2^{2021216533464} is an apocalyptic number.

2021216533464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2021216533464 is an abundant number, since it is smaller than the sum of its proper divisors (3032943743256).

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

2021216533464 is a wasteful number, since it uses less digits than its factorization.

2021216533464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18649059 (or 18649055 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 2021216533464 in words is "two trillion, twenty-one billion, two hundred sixteen million, five hundred thirty-three thousand, four hundred sixty-four".