20617074 has 12 divisors (see below), whose sum is σ = 44670366. Its totient is φ = 6872352.

The previous prime is 20617049. The next prime is 20617127. The reversal of 20617074 is 47071602.

It can be written as a sum of positive squares in only one way, i.e., 14402025 + 6215049 = 3795^2 + 2493^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 572679 + ... + 572714.

Almost surely, 2^20617074 is an apocalyptic number.

20617074 is an abundant number, since it is smaller than the sum of its proper divisors (24053292).

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

20617074 is a wasteful number, since it uses less digits than its factorization.

20617074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145401 (or 1145398 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 20617074 is about 4540.6028234145. The cubic root of 20617074 is about 274.2051937658.

Adding to 20617074 its reverse (47071602), we get a palindrome (67688676).

The spelling of 20617074 in words is "twenty million, six hundred seventeen thousand, seventy-four".