19621496755 has 16 divisors (see below), whose sum is σ = 26971648704. Its totient is φ = 13423656960.

The previous prime is 19621496743. The next prime is 19621496761. The reversal of 19621496755 is 55769412691.

It is not a de Polignac number, because 19621496755 - 2¹⁵ = 19621463987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19621496696 and 19621496705.

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, 632206 + ... + 662515.

It is an arithmetic number, because the mean of its divisors is an integer number (1685728044).

Almost surely, 2^19621496755 is an apocalyptic number.

19621496755 is a deficient number, since it is larger than the sum of its proper divisors (7350151949).

19621496755 is a wasteful number, since it uses less digits than its factorization.

19621496755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295166.

The product of its digits is 4082400, while the sum is 55.

The spelling of 19621496755 in words is "nineteen billion, six hundred twenty-one million, four hundred ninety-six thousand, seven hundred fifty-five".