19730320454 has 16 divisors (see below), whose sum is σ = 31900333920. Its totient is φ = 9098222400.

The previous prime is 19730320417. The next prime is 19730320459. The reversal of 19730320454 is 45402303791.

It is a super-2 number, since 2×19730320454² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19730320459) 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, 306722 + ... + 365429.

It is an arithmetic number, because the mean of its divisors is an integer number (1993770870).

Almost surely, 2^19730320454 is an apocalyptic number.

19730320454 is a deficient number, since it is larger than the sum of its proper divisors (12170013466).

19730320454 is a wasteful number, since it uses less digits than its factorization.

19730320454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673295.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 19730320454 in words is "nineteen billion, seven hundred thirty million, three hundred twenty thousand, four hundred fifty-four".