19820020154 has 16 divisors (see below), whose sum is σ = 32486213376. Its totient is φ = 8994252000.

The previous prime is 19820020139. The next prime is 19820020193. The reversal of 19820020154 is 45102002891.

It is a self number, because there is not a number n which added to its sum of digits gives 19820020154.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728747 + ... + 755454.

It is an arithmetic number, because the mean of its divisors is an integer number (2030388336).

Almost surely, 2^19820020154 is an apocalyptic number.

19820020154 is a deficient number, since it is larger than the sum of its proper divisors (12666193222).

19820020154 is a wasteful number, since it uses less digits than its factorization.

19820020154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484821.

The product of its (nonzero) digits is 5760, while the sum is 32.

The spelling of 19820020154 in words is "nineteen billion, eight hundred twenty million, twenty thousand, one hundred fifty-four".