20496390 has 32 divisors (see below), whose sum is σ = 52086240. Its totient is φ = 5144064.

The previous prime is 20496349. The next prime is 20496397. The reversal of 20496390 is 9369402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20496397) 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, 19585 + ... + 20604.

It is an arithmetic number, because the mean of its divisors is an integer number (1627695).

Almost surely, 2^20496390 is an apocalyptic number.

20496390 is an abundant number, since it is smaller than the sum of its proper divisors (31589850).

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

20496390 is a wasteful number, since it uses less digits than its factorization.

20496390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40216.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 20496390 is about 4527.2938937074. The cubic root of 20496390 is about 273.6691176990.

The spelling of 20496390 in words is "twenty million, four hundred ninety-six thousand, three hundred ninety".