21374101 has 4 divisors (see below), whose sum is σ = 24427552. Its totient is φ = 18320652.

The previous prime is 21374071. The next prime is 21374113. The reversal of 21374101 is 10147312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21374101 - 2⁹ = 21373589 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 (21371101) 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, 1526715 + ... + 1526728.

It is an arithmetic number, because the mean of its divisors is an integer number (6106888).

Almost surely, 2^21374101 is an apocalyptic number.

It is an amenable number.

21374101 is a deficient number, since it is larger than the sum of its proper divisors (3053451).

21374101 is an equidigital number, since it uses as much as digits as its factorization.

21374101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053450.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 21374101 is about 4623.2132764994. The cubic root of 21374101 is about 277.5210643318.

The spelling of 21374101 in words is "twenty-one million, three hundred seventy-four thousand, one hundred one".