19421994470 has 16 divisors (see below), whose sum is σ = 35772604560. Its totient is φ = 7588127904.

The previous prime is 19421994457. The next prime is 19421994479. The reversal of 19421994470 is 7449912491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19421994479) 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, 22583285 + ... + 22584144.

It is an arithmetic number, because the mean of its divisors is an integer number (2235787785).

Almost surely, 2^19421994470 is an apocalyptic number.

19421994470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19421994470 is a deficient number, since it is larger than the sum of its proper divisors (16350610090).

19421994470 is a wasteful number, since it uses less digits than its factorization.

19421994470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45167479.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 19421994470 in words is "nineteen billion, four hundred twenty-one million, nine hundred ninety-four thousand, four hundred seventy".