40013451021 has 32 divisors (see below), whose sum is σ = 57474413568. Its totient is φ = 24672510720.

The previous prime is 40013451019. The next prime is 40013451061. The reversal of 40013451021 is 12015431004.

It is not a de Polignac number, because 40013451021 - 2¹ = 40013451019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40013451061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 659070 + ... + 717216.

It is an arithmetic number, because the mean of its divisors is an integer number (1796075424).

Almost surely, 2^40013451021 is an apocalyptic number.

It is an amenable number.

40013451021 is a deficient number, since it is larger than the sum of its proper divisors (17460962547).

40013451021 is a wasteful number, since it uses less digits than its factorization.

40013451021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58401.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 40013451021 its reverse (12015431004), we get a palindrome (52028882025).

The spelling of 40013451021 in words is "forty billion, thirteen million, four hundred fifty-one thousand, twenty-one".