20219749967 has 2 divisors, whose sum is σ = 20219749968. Its totient is φ = 20219749966.

The previous prime is 20219749951. The next prime is 20219749997. The reversal of 20219749967 is 76994791202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20219749967 - 2⁴ = 20219749951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20219749997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10109874983 + 10109874984.

It is an arithmetic number, because the mean of its divisors is an integer number (10109874984).

Almost surely, 2^20219749967 is an apocalyptic number.

20219749967 is a deficient number, since it is larger than the sum of its proper divisors (1).

20219749967 is an equidigital number, since it uses as much as digits as its factorization.

20219749967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3429216, while the sum is 56.

The spelling of 20219749967 in words is "twenty billion, two hundred nineteen million, seven hundred forty-nine thousand, nine hundred sixty-seven".