20378402 has 16 divisors (see below), whose sum is σ = 33426432. Its totient is φ = 9240720.

The previous prime is 20378399. The next prime is 20378417. The reversal of 20378402 is 20487302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11423 + ... + 13085.

It is an arithmetic number, because the mean of its divisors is an integer number (2089152).

Almost surely, 2^20378402 is an apocalyptic number.

20378402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20378402 is a deficient number, since it is larger than the sum of its proper divisors (13048030).

20378402 is a wasteful number, since it uses less digits than its factorization.

20378402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20378402 is about 4514.2443442951. The cubic root of 20378402 is about 273.1429790384.

Subtracting 20378402 from its reverse (20487302), we obtain a square (108900 = 330²).

The spelling of 20378402 in words is "twenty million, three hundred seventy-eight thousand, four hundred two".