19121996 has 6 divisors (see below), whose sum is σ = 33463500. Its totient is φ = 9560996.

The previous prime is 19121987. The next prime is 19122013. The reversal of 19121996 is 69912191.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2390246 + ... + 2390253.

It is an arithmetic number, because the mean of its divisors is an integer number (5577250).

Almost surely, 2^19121996 is an apocalyptic number.

It is an amenable number.

19121996 is a deficient number, since it is larger than the sum of its proper divisors (14341504).

19121996 is a wasteful number, since it uses less digits than its factorization.

19121996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4780503 (or 4780501 counting only the distinct ones).

The product of its digits is 8748, while the sum is 38.

The square root of 19121996 is about 4372.8704531463. The cubic root of 19121996 is about 267.4100597274.

The spelling of 19121996 in words is "nineteen million, one hundred twenty-one thousand, nine hundred ninety-six".