19629430140 has 48 divisors (see below), whose sum is σ = 55103761440. Its totient is φ = 5221052160.

The previous prime is 19629430127. The next prime is 19629430141. The reversal of 19629430140 is 4103492691.

It is a super-2 number, since 2×19629430140² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19629430141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397171 + ... + 443850.

It is an arithmetic number, because the mean of its divisors is an integer number (1147995030).

Almost surely, 2^19629430140 is an apocalyptic number.

19629430140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19629430140 is an abundant number, since it is smaller than the sum of its proper divisors (35474331300).

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

19629430140 is a wasteful number, since it uses less digits than its factorization.

19629430140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841422 (or 841420 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 19629430140 in words is "nineteen billion, six hundred twenty-nine million, four hundred thirty thousand, one hundred forty".