7940481021 has 48 divisors (see below), whose sum is σ = 12664304640. Its totient is φ = 4754201760.

The previous prime is 7940481001. The next prime is 7940481053. The reversal of 7940481021 is 1201840497.

It is not a de Polignac number, because 7940481021 - 2¹⁸ = 7940218877 is a prime.

It is a super-2 number, since 2×7940481021² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7940481001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4903750 + ... + 4905368.

It is an arithmetic number, because the mean of its divisors is an integer number (263839680).

Almost surely, 2^7940481021 is an apocalyptic number.

It is an amenable number.

7940481021 is a deficient number, since it is larger than the sum of its proper divisors (4723823619).

7940481021 is a wasteful number, since it uses less digits than its factorization.

7940481021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206 (or 2203 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 7940481021 is about 89109.3767288269. The cubic root of 7940481021 is about 1995.0277336111.

The spelling of 7940481021 in words is "seven billion, nine hundred forty million, four hundred eighty-one thousand, twenty-one".