20015748 has 60 divisors (see below), whose sum is σ = 52785040. Its totient is φ = 6613488.

The previous prime is 20015731. The next prime is 20015753. The reversal of 20015748 is 84751002.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 52623 + ... + 53001.

Almost surely, 2^20015748 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 20015748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26392520).

20015748 is an abundant number, since it is smaller than the sum of its proper divisors (32769292).

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

20015748 is a wasteful number, since it uses less digits than its factorization.

20015748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 20015748 is about 4473.8962884716. The cubic root of 20015748 is about 271.5129873828.

It can be divided in two parts, 200157 and 48, that multiplied together give a triangular number (9607536 = T₄₃₈₃).

The spelling of 20015748 in words is "twenty million, fifteen thousand, seven hundred forty-eight".