2021479677 has 24 divisors (see below), whose sum is σ = 3338999040. Its totient is φ = 1154455200.

The previous prime is 2021479667. The next prime is 2021479753. The reversal of 2021479677 is 7769741202.

It is not a de Polignac number, because 2021479677 - 2⁴ = 2021479661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021479627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111324 + ... + 128202.

It is an arithmetic number, because the mean of its divisors is an integer number (139124960).

Almost surely, 2^2021479677 is an apocalyptic number.

It is an amenable number.

2021479677 is a deficient number, since it is larger than the sum of its proper divisors (1317519363).

2021479677 is a wasteful number, since it uses less digits than its factorization.

2021479677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18793 (or 18790 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 2021479677 is about 44960.8682856548. The cubic root of 2021479677 is about 1264.4154479201.

The spelling of 2021479677 in words is "two billion, twenty-one million, four hundred seventy-nine thousand, six hundred seventy-seven".