20001100021967 has 2 divisors, whose sum is σ = 20001100021968. Its totient is φ = 20001100021966.

The previous prime is 20001100021963. The next prime is 20001100021997. The reversal of 20001100021967 is 76912000110002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001100021967 - 2² = 20001100021963 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001100021963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000550010983 + 10000550010984.

It is an arithmetic number, because the mean of its divisors is an integer number (10000550010984).

Almost surely, 2^{20001100021967} is an apocalyptic number.

20001100021967 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001100021967 is an equidigital number, since it uses as much as digits as its factorization.

20001100021967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 29.

Adding to 20001100021967 its reverse (76912000110002), we get a palindrome (96913100131969).

The spelling of 20001100021967 in words is "twenty trillion, one billion, one hundred million, twenty-one thousand, nine hundred sixty-seven".