19960557 has 8 divisors (see below), whose sum is σ = 27233184. Its totient is φ = 12997488.

The previous prime is 19960553. The next prime is 19960627. The reversal of 19960557 is 75506991.

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

It is not a de Polignac number, because 19960557 - 2² = 19960553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19960553) 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, 77238 + ... + 77495.

It is an arithmetic number, because the mean of its divisors is an integer number (3404148).

Almost surely, 2^19960557 is an apocalyptic number.

It is an amenable number.

19960557 is a deficient number, since it is larger than the sum of its proper divisors (7272627).

19960557 is a wasteful number, since it uses less digits than its factorization.

19960557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154779.

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 19960557 is about 4467.7239171641. The cubic root of 19960557 is about 271.2632029364.

The spelling of 19960557 in words is "nineteen million, nine hundred sixty thousand, five hundred fifty-seven".