20001100983637 has 2 divisors, whose sum is σ = 20001100983638. Its totient is φ = 20001100983636.

The previous prime is 20001100983601. The next prime is 20001100983649. The reversal of 20001100983637 is 73638900110002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19053932136561 + 947168847076 = 4365081^2 + 973226^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001100983637 - 2⁴³ = 11205007961429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001100983637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001100983137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000550491818 + 10000550491819.

It is an arithmetic number, because the mean of its divisors is an integer number (10000550491819).

Almost surely, 2^{20001100983637} is an apocalyptic number.

It is an amenable number.

20001100983637 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001100983637 is an equidigital number, since it uses as much as digits as its factorization.

20001100983637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 20001100983637 in words is "twenty trillion, one billion, one hundred million, nine hundred eighty-three thousand, six hundred thirty-seven".