19951650554 has 24 divisors (see below), whose sum is σ = 32903238144. Its totient is φ = 9066796200.

The previous prime is 19951650533. The next prime is 19951650557. The reversal of 19951650554 is 45505615991.

It is not an unprimeable number, because it can be changed into a prime (19951650557) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1511009 + ... + 1524155.

It is an arithmetic number, because the mean of its divisors is an integer number (1370968256).

Almost surely, 2^19951650554 is an apocalyptic number.

19951650554 is a deficient number, since it is larger than the sum of its proper divisors (12951587590).

19951650554 is a wasteful number, since it uses less digits than its factorization.

19951650554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19442 (or 19431 counting only the distinct ones).

The product of its (nonzero) digits is 1215000, while the sum is 50.

The spelling of 19951650554 in words is "nineteen billion, nine hundred fifty-one million, six hundred fifty thousand, five hundred fifty-four".