21496495 has 4 divisors (see below), whose sum is σ = 25795800. Its totient is φ = 17197192.

The previous prime is 21496493. The next prime is 21496499. The reversal of 21496495 is 59469412.

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 21496495 - 2¹ = 21496493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21496493) 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, 2149645 + ... + 2149654.

It is an arithmetic number, because the mean of its divisors is an integer number (6448950).

Almost surely, 2^21496495 is an apocalyptic number.

21496495 is a deficient number, since it is larger than the sum of its proper divisors (4299305).

21496495 is an equidigital number, since it uses as much as digits as its factorization.

21496495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299304.

The product of its digits is 77760, while the sum is 40.

The square root of 21496495 is about 4636.4312784727. The cubic root of 21496495 is about 278.0497771571.

The spelling of 21496495 in words is "twenty-one million, four hundred ninety-six thousand, four hundred ninety-five".