20238884 has 6 divisors (see below), whose sum is σ = 35418054. Its totient is φ = 10119440.

The previous prime is 20238851. The next prime is 20238887. The reversal of 20238884 is 48883202.

It can be written as a sum of positive squares in only one way, i.e., 19998784 + 240100 = 4472^2 + 490^2 .

It is a super-2 number, since 2×20238884² = 819224851130912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20238887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2529857 + ... + 2529864.

It is an arithmetic number, because the mean of its divisors is an integer number (5903009).

Almost surely, 2^20238884 is an apocalyptic number.

It is an amenable number.

20238884 is a deficient number, since it is larger than the sum of its proper divisors (15179170).

20238884 is a wasteful number, since it uses less digits than its factorization.

20238884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5059725 (or 5059723 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 20238884 is about 4498.7647193424. The cubic root of 20238884 is about 272.5182054442.

The spelling of 20238884 in words is "twenty million, two hundred thirty-eight thousand, eight hundred eighty-four".