20645460379 has 2 divisors, whose sum is σ = 20645460380. Its totient is φ = 20645460378.

The previous prime is 20645460373. The next prime is 20645460427. The reversal of 20645460379 is 97306454602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20645460379 - 2³ = 20645460371 is a prime.

It is not a weakly prime, because it can be changed into another prime (20645460371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10322730189 + 10322730190.

It is an arithmetic number, because the mean of its divisors is an integer number (10322730190).

Almost surely, 2^20645460379 is an apocalyptic number.

20645460379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20645460379 is an equidigital number, since it uses as much as digits as its factorization.

20645460379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 20645460379 in words is "twenty billion, six hundred forty-five million, four hundred sixty thousand, three hundred seventy-nine".