20238842 has 8 divisors (see below), whose sum is σ = 32693556. Its totient is φ = 9340992.

The previous prime is 20238821. The next prime is 20238851. The reversal of 20238842 is 24883202.

It can be written as a sum of positive squares in 2 ways, for example, as 19989841 + 249001 = 4471^2 + 499^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20238842² = 819221451001928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389183 + ... + 389234.

Almost surely, 2^20238842 is an apocalyptic number.

20238842 is a deficient number, since it is larger than the sum of its proper divisors (12454714).

20238842 is a wasteful number, since it uses less digits than its factorization.

20238842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778432.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 20238842 is about 4498.7600513919. The cubic root of 20238842 is about 272.5180169329.

The spelling of 20238842 in words is "twenty million, two hundred thirty-eight thousand, eight hundred forty-two".