20688602 has 16 divisors (see below), whose sum is σ = 34013952. Its totient is φ = 9359520.

The previous prime is 20688593. The next prime is 20688611.

It is a happy number.

20688602 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (20688593) and next prime (20688611).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2798 + ... + 7014.

It is an arithmetic number, because the mean of its divisors is an integer number (2125872).

Almost surely, 2^20688602 is an apocalyptic number.

20688602 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20688602 is a deficient number, since it is larger than the sum of its proper divisors (13325350).

20688602 is a wasteful number, since it uses less digits than its factorization.

20688602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4453.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 20688602 is about 4548.4724908479. The cubic root of 20688602 is about 274.5219330342.

The spelling of 20688602 in words is "twenty million, six hundred eighty-eight thousand, six hundred two".