20212738877 has 2 divisors, whose sum is σ = 20212738878. Its totient is φ = 20212738876.

The previous prime is 20212738841. The next prime is 20212738907. The reversal of 20212738877 is 77883721202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10360389796 + 9852349081 = 101786^2 + 99259^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212738877 - 2¹² = 20212734781 is a prime.

It is a super-2 number, since 2×20212738877² (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 (20212738837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106369438 + 10106369439.

It is an arithmetic number, because the mean of its divisors is an integer number (10106369439).

Almost surely, 2^20212738877 is an apocalyptic number.

It is an amenable number.

20212738877 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212738877 is an equidigital number, since it uses as much as digits as its factorization.

20212738877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 526848, while the sum is 47.

The spelling of 20212738877 in words is "twenty billion, two hundred twelve million, seven hundred thirty-eight thousand, eight hundred seventy-seven".