20256078 has 16 divisors (see below), whose sum is σ = 42895440. Its totient is φ = 6354816.

The previous prime is 20256073. The next prime is 20256127. The reversal of 20256078 is 87065202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20256073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99193 + ... + 99396.

It is an arithmetic number, because the mean of its divisors is an integer number (2680965).

Almost surely, 2^20256078 is an apocalyptic number.

20256078 is an abundant number, since it is smaller than the sum of its proper divisors (22639362).

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

20256078 is a wasteful number, since it uses less digits than its factorization.

20256078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198611.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20256078 is about 4500.6752826659. The cubic root of 20256078 is about 272.5953564659.

It can be divided in two parts, 202 and 56078, that added together give a triangular number (56280 = T₃₃₅).

The spelling of 20256078 in words is "twenty million, two hundred fifty-six thousand, seventy-eight".