20700887 has 2 divisors, whose sum is σ = 20700888. Its totient is φ = 20700886.

The previous prime is 20700833. The next prime is 20700929. The reversal of 20700887 is 78800702.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20700887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20700817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10350443 + 10350444.

It is an arithmetic number, because the mean of its divisors is an integer number (10350444).

Almost surely, 2^20700887 is an apocalyptic number.

20700887 is a deficient number, since it is larger than the sum of its proper divisors (1).

20700887 is an equidigital number, since it uses as much as digits as its factorization.

20700887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 20700887 is about 4549.8227438000. The cubic root of 20700887 is about 274.5762598020.

The spelling of 20700887 in words is "twenty million, seven hundred thousand, eight hundred eighty-seven".