20598881 has 2 divisors, whose sum is σ = 20598882. Its totient is φ = 20598880.

The previous prime is 20598859. The next prime is 20598887. The reversal of 20598881 is 18889502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19891600 + 707281 = 4460^2 + 841^2 .

It is a cyclic number.

It is not a de Polignac number, because 20598881 - 2¹⁸ = 20336737 is a prime.

It is a super-2 number, since 2×20598881² = 848627796904322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20598887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10299440 + 10299441.

It is an arithmetic number, because the mean of its divisors is an integer number (10299441).

Almost surely, 2^20598881 is an apocalyptic number.

It is an amenable number.

20598881 is a deficient number, since it is larger than the sum of its proper divisors (1).

20598881 is an equidigital number, since it uses as much as digits as its factorization.

20598881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 20598881 is about 4538.5990129114. The cubic root of 20598881 is about 274.1245149529.

The spelling of 20598881 in words is "twenty million, five hundred ninety-eight thousand, eight hundred eighty-one".