20888248877 has 2 divisors, whose sum is σ = 20888248878. Its totient is φ = 20888248876.

The previous prime is 20888248841. The next prime is 20888248889. The reversal of 20888248877 is 77884288802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13237422916 + 7650825961 = 115054^2 + 87469^2 .

It is a cyclic number.

It is not a de Polignac number, because 20888248877 - 2¹⁴ = 20888232493 is a prime.

It is a super-2 number, since 2×20888248877² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20888248807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10444124438 + 10444124439.

It is an arithmetic number, because the mean of its divisors is an integer number (10444124439).

Almost surely, 2^20888248877 is an apocalyptic number.

It is an amenable number.

20888248877 is a deficient number, since it is larger than the sum of its proper divisors (1).

20888248877 is an equidigital number, since it uses as much as digits as its factorization.

20888248877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25690112, while the sum is 62.

The spelling of 20888248877 in words is "twenty billion, eight hundred eighty-eight million, two hundred forty-eight thousand, eight hundred seventy-seven".