20747044451 has 8 divisors (see below), whose sum is σ = 23977323360. Its totient is φ = 17583369408.

The previous prime is 20747044421. The next prime is 20747044481. The reversal of 20747044451 is 15444074702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20747044421) and next prime (20747044481).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20747044451 - 2¹⁸ = 20746782307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20747044411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16650296 + ... + 16651541.

It is an arithmetic number, because the mean of its divisors is an integer number (2997165420).

Almost surely, 2^20747044451 is an apocalyptic number.

20747044451 is a deficient number, since it is larger than the sum of its proper divisors (3230278909).

20747044451 is an equidigital number, since it uses as much as digits as its factorization.

20747044451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33301933.

The product of its (nonzero) digits is 125440, while the sum is 38.

The spelling of 20747044451 in words is "twenty billion, seven hundred forty-seven million, forty-four thousand, four hundred fifty-one".