21374403431125 has 32 divisors (see below), whose sum is σ = 27537319600128. Its totient is φ = 16546980528000.

The previous prime is 21374403431057. The next prime is 21374403431131. The reversal of 21374403431125 is 52113430447312.

It is not a de Polignac number, because 21374403431125 - 2⁴¹ = 19175380175573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71992732 + ... + 72289018.

It is an arithmetic number, because the mean of its divisors is an integer number (860541237504).

Almost surely, 2^{21374403431125} is an apocalyptic number.

21374403431125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21374403431125 is a deficient number, since it is larger than the sum of its proper divisors (6162916169003).

21374403431125 is a wasteful number, since it uses less digits than its factorization.

21374403431125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314950 (or 314940 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

Adding to 21374403431125 its reverse (52113430447312), we get a palindrome (73487833878437).

The spelling of 21374403431125 in words is "twenty-one trillion, three hundred seventy-four billion, four hundred three million, four hundred thirty-one thousand, one hundred twenty-five".