20238887 has 2 divisors, whose sum is σ = 20238888. Its totient is φ = 20238886.

The previous prime is 20238851. The next prime is 20238901. The reversal of 20238887 is 78883202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20238887 - 2¹⁸ = 19976743 is a prime.

It is a super-2 number, since 2×20238887² = 819225093997538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20238887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20238587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10119443 + 10119444.

It is an arithmetic number, because the mean of its divisors is an integer number (10119444).

Almost surely, 2^20238887 is an apocalyptic number.

20238887 is a deficient number, since it is larger than the sum of its proper divisors (1).

20238887 is an equidigital number, since it uses as much as digits as its factorization.

20238887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 20238887 is about 4498.7650527673. The cubic root of 20238887 is about 272.5182189093.

The spelling of 20238887 in words is "twenty million, two hundred thirty-eight thousand, eight hundred eighty-seven".