20402378 has 8 divisors (see below), whose sum is σ = 30667872. Its totient is φ = 10179756.

The previous prime is 20402351. The next prime is 20402381. The reversal of 20402378 is 87320402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9500 + ... + 11447.

It is an arithmetic number, because the mean of its divisors is an integer number (3833484).

Almost surely, 2^20402378 is an apocalyptic number.

20402378 is a deficient number, since it is larger than the sum of its proper divisors (10265494).

20402378 is a wasteful number, since it uses less digits than its factorization.

20402378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21436.

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

The square root of 20402378 is about 4516.8991576080. The cubic root of 20402378 is about 273.2500582458.

The spelling of 20402378 in words is "twenty million, four hundred two thousand, three hundred seventy-eight".