14992947821 has 2 divisors, whose sum is σ = 14992947822. Its totient is φ = 14992947820.

The previous prime is 14992947733. The next prime is 14992947841. The reversal of 14992947821 is 12874929941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10792093225 + 4200854596 = 103885^2 + 64814^2 .

It is an emirp because it is prime and its reverse (12874929941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14992947821 - 2²² = 14988753517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14992947841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7496473910 + 7496473911.

It is an arithmetic number, because the mean of its divisors is an integer number (7496473911).

Almost surely, 2^14992947821 is an apocalyptic number.

It is an amenable number.

14992947821 is a deficient number, since it is larger than the sum of its proper divisors (1).

14992947821 is an equidigital number, since it uses as much as digits as its factorization.

14992947821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 56.

The spelling of 14992947821 in words is "fourteen billion, nine hundred ninety-two million, nine hundred forty-seven thousand, eight hundred twenty-one".