20712423 has 8 divisors (see below), whose sum is σ = 27641088. Its totient is φ = 13796024.

The previous prime is 20712403. The next prime is 20712431. The reversal of 20712423 is 32421702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20712423 - 2¹⁰ = 20711399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20712423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20712403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2140 + ... + 6782.

It is an arithmetic number, because the mean of its divisors is an integer number (3455136).

Almost surely, 2^20712423 is an apocalyptic number.

20712423 is a deficient number, since it is larger than the sum of its proper divisors (6928665).

20712423 is a wasteful number, since it uses less digits than its factorization.

20712423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6133.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20712423 is about 4551.0903089260. The cubic root of 20712423 is about 274.6272547751.

The spelling of 20712423 in words is "twenty million, seven hundred twelve thousand, four hundred twenty-three".