20713835 has 4 divisors (see below), whose sum is σ = 24856608. Its totient is φ = 16571064.

The previous prime is 20713829. The next prime is 20713853. The reversal of 20713835 is 53831702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20713835 - 2¹⁴ = 20697451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20713798 and 20713807.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2071379 + ... + 2071388.

It is an arithmetic number, because the mean of its divisors is an integer number (6214152).

Almost surely, 2^20713835 is an apocalyptic number.

20713835 is a deficient number, since it is larger than the sum of its proper divisors (4142773).

20713835 is an equidigital number, since it uses as much as digits as its factorization.

20713835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142772.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20713835 is about 4551.2454339444. The cubic root of 20713835 is about 274.6334952308.

The spelling of 20713835 in words is "twenty million, seven hundred thirteen thousand, eight hundred thirty-five".