20255402 has 8 divisors (see below), whose sum is σ = 31029696. Its totient is φ = 9912172.

The previous prime is 20255399. The next prime is 20255413. The reversal of 20255402 is 20455202.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107648 + ... + 107835.

It is an arithmetic number, because the mean of its divisors is an integer number (3878712).

Almost surely, 2^20255402 is an apocalyptic number.

20255402 is a deficient number, since it is larger than the sum of its proper divisors (10774294).

20255402 is a wasteful number, since it uses less digits than its factorization.

20255402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215532.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20255402 is about 4500.6001821979. The cubic root of 20255402 is about 272.5923240179.

The spelling of 20255402 in words is "twenty million, two hundred fifty-five thousand, four hundred two".