20238901 has 2 divisors, whose sum is σ = 20238902. Its totient is φ = 20238900.

The previous prime is 20238887. The next prime is 20238913. The reversal of 20238901 is 10983202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19847025 + 391876 = 4455^2 + 626^2 .

It is a cyclic number.

It is not a de Polignac number, because 20238901 - 2¹⁹ = 19714613 is a prime.

It is a super-2 number, since 2×20238901² = 819226227375602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20238601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10119450 + 10119451.

It is an arithmetic number, because the mean of its divisors is an integer number (10119451).

Almost surely, 2^20238901 is an apocalyptic number.

It is an amenable number.

20238901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20238901 is an equidigital number, since it uses as much as digits as its factorization.

20238901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 20238901 is about 4498.7666087496. The cubic root of 20238901 is about 272.5182817463.

The spelling of 20238901 in words is "twenty million, two hundred thirty-eight thousand, nine hundred one".