19650520157 has 8 divisors (see below), whose sum is σ = 21352008960. Its totient is φ = 18015756480.

The previous prime is 19650520091. The next prime is 19650520177. The reversal of 19650520157 is 75102505691.

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 19650520157 - 2⁸ = 19650519901 is a prime.

It is a super-3 number, since 3×19650520157³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19650520177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16680668 + ... + 16681845.

It is an arithmetic number, because the mean of its divisors is an integer number (2669001120).

Almost surely, 2^19650520157 is an apocalyptic number.

It is an amenable number.

19650520157 is a deficient number, since it is larger than the sum of its proper divisors (1701488803).

19650520157 is a wasteful number, since it uses less digits than its factorization.

19650520157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33362563.

The product of its (nonzero) digits is 94500, while the sum is 41.

The spelling of 19650520157 in words is "nineteen billion, six hundred fifty million, five hundred twenty thousand, one hundred fifty-seven".