20266280 has 32 divisors (see below), whose sum is σ = 46051200. Its totient is φ = 8026176.

The previous prime is 20266277. The next prime is 20266283. The reversal of 20266280 is 8266202.

It is an interprime number because it is at equal distance from previous prime (20266277) and next prime (20266283).

It is not an unprimeable number, because it can be changed into a prime (20266283) 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, 1661 + ... + 6579.

It is an arithmetic number, because the mean of its divisors is an integer number (1439100).

Almost surely, 2^20266280 is an apocalyptic number.

20266280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20266280 is an abundant number, since it is smaller than the sum of its proper divisors (25784920).

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

20266280 is a wasteful number, since it uses less digits than its factorization.

20266280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5033 (or 5029 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20266280 is about 4501.8085254706. The cubic root of 20266280 is about 272.6411131201.

The spelling of 20266280 in words is "twenty million, two hundred sixty-six thousand, two hundred eighty".