19420726440000 has 140 divisors (see below), whose sum is σ = 64209453510224. Its totient is φ = 5178860352000.

The previous prime is 19420726439971. The next prime is 19420726440041. The reversal of 19420726440000 is 4462702491.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 80799694 + ... + 81039693.

Almost surely, 2^{19420726440000} is an apocalyptic number.

19420726440000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19420726440000 is an abundant number, since it is smaller than the sum of its proper divisors (44788727070224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19420726440000 is an equidigital number, since it uses as much as digits as its factorization.

19420726440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161839422 (or 161839397 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 19420726440000 in words is "nineteen trillion, four hundred twenty billion, seven hundred twenty-six million, four hundred forty thousand".