20047488 has 128 divisors (see below), whose sum is σ = 58605120. Its totient is φ = 6045696.

The previous prime is 20047453. The next prime is 20047493. The reversal of 20047488 is 88474002.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×20047488² = 803803550220288, which contains 22 as substring.

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, 241495 + ... + 241577.

Almost surely, 2^20047488 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 20047488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29302560).

20047488 is an abundant number, since it is smaller than the sum of its proper divisors (38557632).

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

20047488 is a wasteful number, since it uses less digits than its factorization.

20047488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 20047488 is about 4477.4421269292. The cubic root of 20047488 is about 271.6564289533.

The spelling of 20047488 in words is "twenty million, forty-seven thousand, four hundred eighty-eight".