19394426424 has 64 divisors (see below), whose sum is σ = 49018776480. Its totient is φ = 6393920000.

The previous prime is 19394426399. The next prime is 19394426449. The reversal of 19394426424 is 42462449391.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19394426399) and next prime (19394426449).

It is a super-2 number, since 2×19394426424² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2568094 + ... + 2575634.

Almost surely, 2^19394426424 is an apocalyptic number.

It is an amenable number.

19394426424 is an abundant number, since it is smaller than the sum of its proper divisors (29624350056).

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

19394426424 is a wasteful number, since it uses less digits than its factorization.

19394426424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8712 (or 8708 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 48.

The spelling of 19394426424 in words is "nineteen billion, three hundred ninety-four million, four hundred twenty-six thousand, four hundred twenty-four".