20735407 has 12 divisors (see below), whose sum is σ = 26048848. Its totient is φ = 16156800.

The previous prime is 20735383. The next prime is 20735419. The reversal of 20735407 is 70453702.

It is not a de Polignac number, because 20735407 - 2¹¹ = 20733359 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20735437) 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, 11394 + ... + 13087.

Almost surely, 2^20735407 is an apocalyptic number.

20735407 is a deficient number, since it is larger than the sum of its proper divisors (5313441).

20735407 is a wasteful number, since it uses less digits than its factorization.

20735407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24510 (or 24499 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 20735407 is about 4553.6147180015. The cubic root of 20735407 is about 274.7287993007.

The spelling of 20735407 in words is "twenty million, seven hundred thirty-five thousand, four hundred seven".