19890548 has 12 divisors (see below), whose sum is σ = 34974912. Its totient is φ = 9897720.

The previous prime is 19890523. The next prime is 19890583. The reversal of 19890548 is 84509891.

It is a junction number, because it is equal to n+sod(n) for n = 19890499 and 19890508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10940 + ... + 12627.

It is an arithmetic number, because the mean of its divisors is an integer number (2914576).

Almost surely, 2^19890548 is an apocalyptic number.

It is an amenable number.

19890548 is a deficient number, since it is larger than the sum of its proper divisors (15084364).

19890548 is a wasteful number, since it uses less digits than its factorization.

19890548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23782 (or 23780 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 19890548 is about 4459.8820612209. The cubic root of 19890548 is about 270.9456915633.

The spelling of 19890548 in words is "nineteen million, eight hundred ninety thousand, five hundred forty-eight".