21348512 has 12 divisors (see below), whose sum is σ = 42029946. Its totient is φ = 10674240.

The previous prime is 21348497. The next prime is 21348517. The reversal of 21348512 is 21584312.

It can be written as a sum of positive squares in only one way, i.e., 12082576 + 9265936 = 3476^2 + 3044^2 .

It is a super-2 number, since 2×21348512² = 911517929228288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21348517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333539 + ... + 333602.

Almost surely, 2^21348512 is an apocalyptic number.

It is an amenable number.

21348512 is a deficient number, since it is larger than the sum of its proper divisors (20681434).

21348512 is an equidigital number, since it uses as much as digits as its factorization.

21348512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667151 (or 667143 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 21348512 is about 4620.4450002137. The cubic root of 21348512 is about 277.4102710192.

The spelling of 21348512 in words is "twenty-one million, three hundred forty-eight thousand, five hundred twelve".