20699698 has 4 divisors (see below), whose sum is σ = 31049550. Its totient is φ = 10349848.

The previous prime is 20699671. The next prime is 20699713. The reversal of 20699698 is 89699602.

It is a happy number.

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., 19829209 + 870489 = 4453^2 + 933^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5174923 + ... + 5174926.

Almost surely, 2^20699698 is an apocalyptic number.

20699698 is a deficient number, since it is larger than the sum of its proper divisors (10349852).

20699698 is a wasteful number, since it uses less digits than its factorization.

20699698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10349851.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 20699698 is about 4549.6920774927. The cubic root of 20699698 is about 274.5710027419.

The spelling of 20699698 in words is "twenty million, six hundred ninety-nine thousand, six hundred ninety-eight".