20427774 has 64 divisors (see below), whose sum is σ = 45964800. Its totient is φ = 6023808.

The previous prime is 20427773. The next prime is 20427787. The reversal of 20427774 is 47772402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20427773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122239 + ... + 122405.

It is an arithmetic number, because the mean of its divisors is an integer number (718200).

Almost surely, 2^20427774 is an apocalyptic number.

20427774 is an abundant number, since it is smaller than the sum of its proper divisors (25537026).

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

20427774 is a wasteful number, since it uses less digits than its factorization.

20427774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257.

The product of its (nonzero) digits is 21952, while the sum is 33.

The square root of 20427774 is about 4519.7095039394. The cubic root of 20427774 is about 273.3633878645.

The spelling of 20427774 in words is "twenty million, four hundred twenty-seven thousand, seven hundred seventy-four".