40021012004 has 48 divisors (see below), whose sum is σ = 73413270000. Its totient is φ = 19072819200.

The previous prime is 40021011973. The next prime is 40021012019.

40021012004 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 8 ways, for example, as 25312173604 + 14708838400 = 159098^2 + 121280^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40021012004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1477172 + ... + 1504020.

It is an arithmetic number, because the mean of its divisors is an integer number (1529443125).

Almost surely, 2^40021012004 is an apocalyptic number.

It is an amenable number.

40021012004 is a deficient number, since it is larger than the sum of its proper divisors (33392257996).

40021012004 is a wasteful number, since it uses less digits than its factorization.

40021012004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27104 (or 27102 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

It can be divided in two parts, 400210 and 12004, that added together give a palindrome (412214).

The spelling of 40021012004 in words is "forty billion, twenty-one million, twelve thousand, four".