19939148155 has 8 divisors (see below), whose sum is σ = 24967281312. Its totient is φ = 15257782848.

The previous prime is 19939148107. The next prime is 19939148233. The reversal of 19939148155 is 55184193991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19939148155 - 2⁷ = 19939148027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19939148096 and 19939148105.

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, 86691834 + ... + 86692063.

It is an arithmetic number, because the mean of its divisors is an integer number (3120910164).

Almost surely, 2^19939148155 is an apocalyptic number.

19939148155 is a deficient number, since it is larger than the sum of its proper divisors (5028133157).

19939148155 is a wasteful number, since it uses less digits than its factorization.

19939148155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173383925.

The product of its digits is 1749600, while the sum is 55.

The spelling of 19939148155 in words is "nineteen billion, nine hundred thirty-nine million, one hundred forty-eight thousand, one hundred fifty-five".