20413378 has 4 divisors (see below), whose sum is σ = 30620070. Its totient is φ = 10206688.

The previous prime is 20413357. The next prime is 20413399. The reversal of 20413378 is 87331402.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20413357) and next prime (20413399).

It can be written as a sum of positive squares in only one way, i.e., 18636489 + 1776889 = 4317^2 + 1333^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5103343 + ... + 5103346.

Almost surely, 2^20413378 is an apocalyptic number.

20413378 is a deficient number, since it is larger than the sum of its proper divisors (10206692).

20413378 is a wasteful number, since it uses less digits than its factorization.

20413378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10206691.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20413378 is about 4518.1166430273. The cubic root of 20413378 is about 273.2991572711.

The spelling of 20413378 in words is "twenty million, four hundred thirteen thousand, three hundred seventy-eight".