20777098 has 4 divisors (see below), whose sum is σ = 31165650. Its totient is φ = 10388548.

The previous prime is 20777087. The next prime is 20777101. The reversal of 20777098 is 89077702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18258529 + 2518569 = 4273^2 + 1587^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 20777098.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5194273 + ... + 5194276.

Almost surely, 2^20777098 is an apocalyptic number.

20777098 is a deficient number, since it is larger than the sum of its proper divisors (10388552).

20777098 is a wasteful number, since it uses less digits than its factorization.

20777098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10388551.

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 20777098 is about 4558.1902110377. The cubic root of 20777098 is about 274.9128010034.

The spelling of 20777098 in words is "twenty million, seven hundred seventy-seven thousand, ninety-eight".