19621404235 has 16 divisors (see below), whose sum is σ = 24125058720. Its totient is φ = 15311036160.

The previous prime is 19621404211. The next prime is 19621404293. The reversal of 19621404235 is 53240412691.

It is a happy number.

It is not a de Polignac number, because 19621404235 - 2⁵ = 19621404203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19621404194 and 19621404203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1552321 + ... + 1564909.

It is an arithmetic number, because the mean of its divisors is an integer number (1507816170).

Almost surely, 2^19621404235 is an apocalyptic number.

19621404235 is a deficient number, since it is larger than the sum of its proper divisors (4503654485).

19621404235 is a wasteful number, since it uses less digits than its factorization.

19621404235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20238.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 19621404235 in words is "nineteen billion, six hundred twenty-one million, four hundred four thousand, two hundred thirty-five".