20412280 has 32 divisors (see below), whose sum is σ = 52489440. Its totient is φ = 6998400.

The previous prime is 20412277. The next prime is 20412319. The reversal of 20412280 is 8221402.

It is a super-2 number, since 2×20412280² = 833322349596800, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36171 + ... + 36730.

It is an arithmetic number, because the mean of its divisors is an integer number (1640295).

Almost surely, 2^20412280 is an apocalyptic number.

20412280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20412280 is an abundant number, since it is smaller than the sum of its proper divisors (32077160).

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

20412280 is a wasteful number, since it uses less digits than its factorization.

20412280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72919 (or 72915 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 20412280 is about 4517.9951305861. The cubic root of 20412280 is about 273.2942570882.

Adding to 20412280 its reverse (8221402), we get a palindrome (28633682).

The spelling of 20412280 in words is "twenty million, four hundred twelve thousand, two hundred eighty".