21460737 has 4 divisors (see below), whose sum is σ = 28614320. Its totient is φ = 14307156.

The previous prime is 21460727. The next prime is 21460787. The reversal of 21460737 is 73706412.

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 21460737 - 2¹² = 21456641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21460727) 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, 3576787 + ... + 3576792.

It is an arithmetic number, because the mean of its divisors is an integer number (7153580).

Almost surely, 2^21460737 is an apocalyptic number.

It is an amenable number.

21460737 is a deficient number, since it is larger than the sum of its proper divisors (7153583).

21460737 is an equidigital number, since it uses as much as digits as its factorization.

21460737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7153582.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 21460737 is about 4632.5734748625. The cubic root of 21460737 is about 277.8955191113.

The spelling of 21460737 in words is "twenty-one million, four hundred sixty thousand, seven hundred thirty-seven".