20390360 has 32 divisors (see below), whose sum is σ = 46513440. Its totient is φ = 8043264.

The previous prime is 20390353. The next prime is 20390399. The reversal of 20390360 is 6309302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (1453545).

Almost surely, 2^20390360 is an apocalyptic number.

20390360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20390360 is an abundant number, since it is smaller than the sum of its proper divisors (26123080).

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

20390360 is a wasteful number, since it uses less digits than its factorization.

20390360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7067 (or 7063 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 20390360 is about 4515.5686242156. The cubic root of 20390360 is about 273.1963951515.

Adding to 20390360 its reverse (6309302), we get a palindrome (26699662).

The spelling of 20390360 in words is "twenty million, three hundred ninety thousand, three hundred sixty".