20427258 has 16 divisors (see below), whose sum is σ = 41035680. Its totient is φ = 6778896.

The previous prime is 20427257. The next prime is 20427271. The reversal of 20427258 is 85272402.

It is a super-4 number, since 4×20427258⁴ (a number of 30 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (20427257) 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, 6060 + ... + 8807.

It is an arithmetic number, because the mean of its divisors is an integer number (2564730).

Almost surely, 2^20427258 is an apocalyptic number.

20427258 is an abundant number, since it is smaller than the sum of its proper divisors (20608422).

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

20427258 is a wasteful number, since it uses less digits than its factorization.

20427258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15101.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 20427258 is about 4519.6524202642. The cubic root of 20427258 is about 273.3610861502.

The spelling of 20427258 in words is "twenty million, four hundred twenty-seven thousand, two hundred fifty-eight".