20280760 has 32 divisors (see below), whose sum is σ = 46110960. Its totient is φ = 8027136.

The previous prime is 20280751. The next prime is 20280761. The reversal of 20280760 is 6708202.

It is a super-2 number, since 2×20280760² = 822618452355200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20280761) 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, 1267 + ... + 6493.

Almost surely, 2^20280760 is an apocalyptic number.

20280760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20280760 is an abundant number, since it is smaller than the sum of its proper divisors (25830200).

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

20280760 is a wasteful number, since it uses less digits than its factorization.

20280760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5335 (or 5331 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20280760 is about 4503.4164808510. The cubic root of 20280760 is about 272.7060305341.

Adding to 20280760 its reverse (6708202), we get a palindrome (26988962).

The spelling of 20280760 in words is "twenty million, two hundred eighty thousand, seven hundred sixty".