20706435 has 80 divisors (see below), whose sum is σ = 40249440. Its totient is φ = 10160640.

The previous prime is 20706431. The next prime is 20706449. The reversal of 20706435 is 53460702.

It is a happy number.

It is not a de Polignac number, because 20706435 - 2² = 20706431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20706399 and 20706408.

It is not an unprimeable number, because it can be changed into a prime (20706431) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 481524 + ... + 481566.

It is an arithmetic number, because the mean of its divisors is an integer number (503118).

Almost surely, 2^20706435 is an apocalyptic number.

20706435 is a deficient number, since it is larger than the sum of its proper divisors (19543005).

20706435 is a wasteful number, since it uses less digits than its factorization.

20706435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 121 counting only the distinct ones).

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

The square root of 20706435 is about 4550.4323970366. The cubic root of 20706435 is about 274.6007871410.

Subtracting from 20706435 its product of nonzero digits (5040), we obtain a triangular number (20701395 = T₆₄₃₄).

The spelling of 20706435 in words is "twenty million, seven hundred six thousand, four hundred thirty-five".