20344679 has 2 divisors, whose sum is σ = 20344680. Its totient is φ = 20344678.

The previous prime is 20344619. The next prime is 20344691. The reversal of 20344679 is 97644302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20344679 - 2¹⁶ = 20279143 is a prime.

It is a super-2 number, since 2×20344679² = 827811927226082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20344619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172339 + 10172340.

It is an arithmetic number, because the mean of its divisors is an integer number (10172340).

Almost surely, 2^20344679 is an apocalyptic number.

20344679 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344679 is an equidigital number, since it uses as much as digits as its factorization.

20344679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 20344679 is about 4510.5076210999. The cubic root of 20344679 is about 272.9922265181.

The spelling of 20344679 in words is "twenty million, three hundred forty-four thousand, six hundred seventy-nine".