20015732 has 24 divisors (see below), whose sum is σ = 40461120. Its totient is φ = 8562560.

The previous prime is 20015731. The next prime is 20015753. The reversal of 20015732 is 23751002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20015731) 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, 12632 + ... + 14127.

It is an arithmetic number, because the mean of its divisors is an integer number (1685880).

Almost surely, 2^20015732 is an apocalyptic number.

20015732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20015732 is an abundant number, since it is smaller than the sum of its proper divisors (20445388).

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

20015732 is a wasteful number, since it uses less digits than its factorization.

20015732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26791 (or 26789 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20015732 is about 4473.8945003207. The cubic root of 20015732 is about 271.5129150362.

Adding to 20015732 its reverse (23751002), we get a palindrome (43766734).

The spelling of 20015732 in words is "twenty million, fifteen thousand, seven hundred thirty-two".