20495910 has 32 divisors (see below), whose sum is σ = 49496832. Its totient is φ = 5431520.

The previous prime is 20495887. The next prime is 20495963. The reversal of 20495910 is 1959402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2965 + ... + 7055.

It is an arithmetic number, because the mean of its divisors is an integer number (1546776).

Almost surely, 2^20495910 is an apocalyptic number.

20495910 is an abundant number, since it is smaller than the sum of its proper divisors (29000922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20495910 is a wasteful number, since it uses less digits than its factorization.

20495910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 20495910 is about 4527.2408815966. The cubic root of 20495910 is about 273.6669813521. Note that the first 3 decimals are identical.

It can be divided in two parts, 204 and 95910, that multiplied together give a triangular number (19565640 = T₆₂₅₅).

The spelling of 20495910 in words is "twenty million, four hundred ninety-five thousand, nine hundred ten".