21374461626407 has 4 divisors (see below), whose sum is σ = 21378791074656. Its totient is φ = 21370132178160.

The previous prime is 21374461626359. The next prime is 21374461626481. The reversal of 21374461626407 is 70462616447312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21374461626407 - 2²⁶ = 21374394517543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374461626487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2164716719 + ... + 2164726592.

It is an arithmetic number, because the mean of its divisors is an integer number (5344697768664).

Almost surely, 2^{21374461626407} is an apocalyptic number.

21374461626407 is a deficient number, since it is larger than the sum of its proper divisors (4329448249).

21374461626407 is an equidigital number, since it uses as much as digits as its factorization.

21374461626407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329448248.

The product of its (nonzero) digits is 8128512, while the sum is 53.

The spelling of 21374461626407 in words is "twenty-one trillion, three hundred seventy-four billion, four hundred sixty-one million, six hundred twenty-six thousand, four hundred seven".