20733327451 has 2 divisors, whose sum is σ = 20733327452. Its totient is φ = 20733327450.

The previous prime is 20733327443. The next prime is 20733327473. The reversal of 20733327451 is 15472333702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20733327451 - 2³ = 20733327443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20733327451.

It is not a weakly prime, because it can be changed into another prime (20733327401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10366663725 + 10366663726.

It is an arithmetic number, because the mean of its divisors is an integer number (10366663726).

Almost surely, 2^20733327451 is an apocalyptic number.

20733327451 is a deficient number, since it is larger than the sum of its proper divisors (1).

20733327451 is an equidigital number, since it uses as much as digits as its factorization.

20733327451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 37.

The spelling of 20733327451 in words is "twenty billion, seven hundred thirty-three million, three hundred twenty-seven thousand, four hundred fifty-one".