40387460021 has 16 divisors (see below), whose sum is σ = 42292612608. Its totient is φ = 38520748800.

The previous prime is 40387460017. The next prime is 40387460023. The reversal of 40387460021 is 12006478304.

It is not a de Polignac number, because 40387460021 - 2² = 40387460017 is a prime.

It is a super-2 number, since 2×40387460021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40387460023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3458825 + ... + 3470481.

It is an arithmetic number, because the mean of its divisors is an integer number (2643288288).

Almost surely, 2^40387460021 is an apocalyptic number.

It is an amenable number.

40387460021 is a deficient number, since it is larger than the sum of its proper divisors (1905152587).

40387460021 is a wasteful number, since it uses less digits than its factorization.

40387460021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13292.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 40387460021 in words is "forty billion, three hundred eighty-seven million, four hundred sixty thousand, twenty-one".