20015632 has 80 divisors (see below), whose sum is σ = 48746880. Its totient is φ = 7750656.

The previous prime is 20015623. The next prime is 20015641. The reversal of 20015632 is 23651002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20015623) and next prime (20015641).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85788 + ... + 86020.

It is an arithmetic number, because the mean of its divisors is an integer number (609336).

Almost surely, 2^20015632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20015632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24373440).

20015632 is an abundant number, since it is smaller than the sum of its proper divisors (28731248).

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

20015632 is a wasteful number, since it uses less digits than its factorization.

20015632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20015632 is about 4473.8833243615. The cubic root of 20015632 is about 271.5124628696.

Adding to 20015632 its reverse (23651002), we get a palindrome (43666634).

The spelling of 20015632 in words is "twenty million, fifteen thousand, six hundred thirty-two".