39946536021 has 12 divisors (see below), whose sum is σ = 61957892832. Its totient is φ = 22826591928.

The previous prime is 39946536017. The next prime is 39946536101. The reversal of 39946536021 is 12063564993.

It is not a de Polignac number, because 39946536021 - 2² = 39946536017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39946536121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135872425 + ... + 135872718.

It is an arithmetic number, because the mean of its divisors is an integer number (5163157736).

Almost surely, 2^39946536021 is an apocalyptic number.

It is an amenable number.

39946536021 is a deficient number, since it is larger than the sum of its proper divisors (22011356811).

39946536021 is a wasteful number, since it uses less digits than its factorization.

39946536021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271745160 (or 271745153 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 48.

The spelling of 39946536021 in words is "thirty-nine billion, nine hundred forty-six million, five hundred thirty-six thousand, twenty-one".