20740635 has 12 divisors (see below), whose sum is σ = 35950512. Its totient is φ = 11061648.

The previous prime is 20740633. The next prime is 20740673. The reversal of 20740635 is 53604702.

It is a happy number.

20740635 is a `hidden beast` number, since 20 + 7 + 4 + 0 + 635 = 666.

It is not a de Polignac number, because 20740635 - 2¹ = 20740633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20740599 and 20740608.

It is not an unprimeable number, because it can be changed into a prime (20740631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230407 + ... + 230496.

It is an arithmetic number, because the mean of its divisors is an integer number (2995876).

Almost surely, 2^20740635 is an apocalyptic number.

20740635 is a deficient number, since it is larger than the sum of its proper divisors (15209877).

20740635 is a wasteful number, since it uses less digits than its factorization.

20740635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460914 (or 460911 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20740635 is about 4554.1887312671. The cubic root of 20740635 is about 274.7518864043.

The spelling of 20740635 in words is "twenty million, seven hundred forty thousand, six hundred thirty-five".