19790450794 has 8 divisors (see below), whose sum is σ = 29760452388. Its totient is φ = 9870300000.

The previous prime is 19790450791. The next prime is 19790450803. The reversal of 19790450794 is 49705409791.

It can be written as a sum of positive squares in 2 ways, for example, as 18882332569 + 908118225 = 137413^2 + 30135^2 .

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

It is not an unprimeable number, because it can be changed into a prime (19790450791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12461707 + ... + 12463294.

Almost surely, 2^19790450794 is an apocalyptic number.

19790450794 is a deficient number, since it is larger than the sum of its proper divisors (9970001594).

19790450794 is a wasteful number, since it uses less digits than its factorization.

19790450794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24925400.

The product of its (nonzero) digits is 2857680, while the sum is 55.

The spelling of 19790450794 in words is "nineteen billion, seven hundred ninety million, four hundred fifty thousand, seven hundred ninety-four".