20723374447 has 2 divisors, whose sum is σ = 20723374448. Its totient is φ = 20723374446.

The previous prime is 20723374439. The next prime is 20723374487. The reversal of 20723374447 is 74447332702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20723374447 - 2³ = 20723374439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20723374487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10361687223 + 10361687224.

It is an arithmetic number, because the mean of its divisors is an integer number (10361687224).

Almost surely, 2^20723374447 is an apocalyptic number.

20723374447 is a deficient number, since it is larger than the sum of its proper divisors (1).

20723374447 is an equidigital number, since it uses as much as digits as its factorization.

20723374447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 43.

The spelling of 20723374447 in words is "twenty billion, seven hundred twenty-three million, three hundred seventy-four thousand, four hundred forty-seven".