21492046 has 16 divisors (see below), whose sum is σ = 34222176. Its totient is φ = 10087936.

The previous prime is 21492043. The next prime is 21492061. The reversal of 21492046 is 64029412.

It is a super-2 number, since 2×21492046² = 923816082532232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21492043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21510 + ... + 22486.

It is an arithmetic number, because the mean of its divisors is an integer number (2138886).

Almost surely, 2^21492046 is an apocalyptic number.

21492046 is a deficient number, since it is larger than the sum of its proper divisors (12730130).

21492046 is a wasteful number, since it uses less digits than its factorization.

21492046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 21492046 is about 4635.9514665277. The cubic root of 21492046 is about 278.0305937381.

The spelling of 21492046 in words is "twenty-one million, four hundred ninety-two thousand, forty-six".