21119739967 has 2 divisors, whose sum is σ = 21119739968. Its totient is φ = 21119739966.

The previous prime is 21119739941. The next prime is 21119739983. The reversal of 21119739967 is 76993791112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21119739967 is a prime.

It is a super-2 number, since 2×21119739967² (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 (21119739937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10559869983 + 10559869984.

It is an arithmetic number, because the mean of its divisors is an integer number (10559869984).

Almost surely, 2^21119739967 is an apocalyptic number.

21119739967 is a deficient number, since it is larger than the sum of its proper divisors (1).

21119739967 is an equidigital number, since it uses as much as digits as its factorization.

21119739967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1285956, while the sum is 55.

The spelling of 21119739967 in words is "twenty-one billion, one hundred nineteen million, seven hundred thirty-nine thousand, nine hundred sixty-seven".