20495460 has 48 divisors (see below), whose sum is σ = 59371200. Its totient is φ = 5276544.

The previous prime is 20495441. The next prime is 20495467. The reversal of 20495460 is 6459402.

It is a super-2 number, since 2×20495460² = 840127761223200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (20495467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4150 + ... + 7629.

It is an arithmetic number, because the mean of its divisors is an integer number (1236900).

Almost surely, 2^20495460 is an apocalyptic number.

20495460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20495460 is an abundant number, since it is smaller than the sum of its proper divisors (38875740).

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

20495460 is a wasteful number, since it uses less digits than its factorization.

20495460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11820 (or 11818 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20495460 is about 4527.1911821791. The cubic root of 20495460 is about 273.6649784965.

The spelling of 20495460 in words is "twenty million, four hundred ninety-five thousand, four hundred sixty".