20598642 has 24 divisors (see below), whose sum is σ = 46170540. Its totient is φ = 6629280.

The previous prime is 20598623. The next prime is 20598653. The reversal of 20598642 is 24689502.

It is a happy number.

20598642 is a `hidden beast` number, since 2 + 0 + 5 + 9 + 8 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20439441 + 159201 = 4521^2 + 399^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20598597 and 20598606.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19209 + ... + 20252.

Almost surely, 2^20598642 is an apocalyptic number.

20598642 is an abundant number, since it is smaller than the sum of its proper divisors (25571898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20598642 is a wasteful number, since it uses less digits than its factorization.

20598642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39498 (or 39495 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 20598642 is about 4538.5726831241. The cubic root of 20598642 is about 274.1234547656.

It can be divided in two parts, 2059 and 8642, that added together give a palindrome (10701).

The spelling of 20598642 in words is "twenty million, five hundred ninety-eight thousand, six hundred forty-two".