20893877 has 2 divisors, whose sum is σ = 20893878. Its totient is φ = 20893876.

The previous prime is 20893861. The next prime is 20893879. The reversal of 20893877 is 77839802.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15295921 + 5597956 = 3911^2 + 2366^2 .

It is a cyclic number.

It is not a de Polignac number, because 20893877 - 2⁴ = 20893861 is a prime.

It is a super-2 number, since 2×20893877² = 873108192182258, which contains 22 as substring.

Together with 20893879, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20893879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10446938 + 10446939.

It is an arithmetic number, because the mean of its divisors is an integer number (10446939).

Almost surely, 2^20893877 is an apocalyptic number.

It is an amenable number.

20893877 is a deficient number, since it is larger than the sum of its proper divisors (1).

20893877 is an equidigital number, since it uses as much as digits as its factorization.

20893877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 20893877 is about 4570.9820607830. The cubic root of 20893877 is about 275.4268939965.

The spelling of 20893877 in words is "twenty million, eight hundred ninety-three thousand, eight hundred seventy-seven".