2021868504 has 24 divisors (see below), whose sum is σ = 5475894060. Its totient is φ = 673956144.

The previous prime is 2021868461. The next prime is 2021868523. The reversal of 2021868504 is 4058681202.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14040682 + ... + 14040825.

Almost surely, 2^2021868504 is an apocalyptic number.

2021868504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2021868504 is an abundant number, since it is smaller than the sum of its proper divisors (3454025556).

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

2021868504 is a wasteful number, since it uses less digits than its factorization.

2021868504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28081519 (or 28081512 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 2021868504 is about 44965.1921379193. The cubic root of 2021868504 is about 1264.4965118643.

The spelling of 2021868504 in words is "two billion, twenty-one million, eight hundred sixty-eight thousand, five hundred four".