20948819629 has 2 divisors, whose sum is σ = 20948819630. Its totient is φ = 20948819628.

The previous prime is 20948819609. The next prime is 20948819641. The reversal of 20948819629 is 92691884902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15976454404 + 4972365225 = 126398^2 + 70515^2 .

It is a cyclic number.

It is not a de Polignac number, because 20948819629 - 2¹⁹ = 20948295341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20948819609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10474409814 + 10474409815.

It is an arithmetic number, because the mean of its divisors is an integer number (10474409815).

Almost surely, 2^20948819629 is an apocalyptic number.

It is an amenable number.

20948819629 is a deficient number, since it is larger than the sum of its proper divisors (1).

20948819629 is an equidigital number, since it uses as much as digits as its factorization.

20948819629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 58.

The spelling of 20948819629 in words is "twenty billion, nine hundred forty-eight million, eight hundred nineteen thousand, six hundred twenty-nine".