19770898 has 16 divisors (see below), whose sum is σ = 35887104. Its totient is φ = 7974720.

The previous prime is 19770889. The next prime is 19770899. The reversal of 19770898 is 89807791.

It is not an unprimeable number, because it can be changed into a prime (19770899) 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, 41298 + ... + 41773.

It is an arithmetic number, because the mean of its divisors is an integer number (2242944).

Almost surely, 2^19770898 is an apocalyptic number.

19770898 is a deficient number, since it is larger than the sum of its proper divisors (16116206).

19770898 is a wasteful number, since it uses less digits than its factorization.

19770898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83097.

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 19770898 is about 4446.4477957129. The cubic root of 19770898 is about 270.4013145047.

The spelling of 19770898 in words is "nineteen million, seven hundred seventy thousand, eight hundred ninety-eight".