20536460 has 36 divisors (see below), whose sum is σ = 49416528. Its totient is φ = 7022688.

The previous prime is 20536457. The next prime is 20536471. The reversal of 20536460 is 6463502.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53429 + ... + 53811.

Almost surely, 2^20536460 is an apocalyptic number.

20536460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20536460 is an abundant number, since it is smaller than the sum of its proper divisors (28880068).

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

20536460 is an equidigital number, since it uses as much as digits as its factorization.

20536460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 20536460 is about 4531.7171138543. The cubic root of 20536460 is about 273.8473406812.

Adding to 20536460 its reverse (6463502), we get a palindrome (26999962).

The spelling of 20536460 in words is "twenty million, five hundred thirty-six thousand, four hundred sixty".