20490378 has 32 divisors (see below), whose sum is σ = 43929216. Its totient is φ = 6355008.

The previous prime is 20490373. The next prime is 20490391. The reversal of 20490378 is 87309402.

It is not an unprimeable number, because it can be changed into a prime (20490373) 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, 3100 + ... + 7112.

It is an arithmetic number, because the mean of its divisors is an integer number (1372788).

Almost surely, 2^20490378 is an apocalyptic number.

20490378 is an abundant number, since it is smaller than the sum of its proper divisors (23438838).

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

20490378 is a wasteful number, since it uses less digits than its factorization.

20490378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4078.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20490378 is about 4526.6298722118. The cubic root of 20490378 is about 273.6423575455.

The spelling of 20490378 in words is "twenty million, four hundred ninety thousand, three hundred seventy-eight".