20723461 has 8 divisors (see below), whose sum is σ = 22640544. Its totient is φ = 18811920.

The previous prime is 20723453. The next prime is 20723473. The reversal of 20723461 is 16432702.

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 20723461 - 2³ = 20723453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20723401) 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, 12846 + ... + 14368.

It is an arithmetic number, because the mean of its divisors is an integer number (2830068).

Almost surely, 2^20723461 is an apocalyptic number.

It is an amenable number.

20723461 is a deficient number, since it is larger than the sum of its proper divisors (1917083).

20723461 is a wasteful number, since it uses less digits than its factorization.

20723461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20723461 is about 4552.3028238464. The cubic root of 20723461 is about 274.6760306123.

The spelling of 20723461 in words is "twenty million, seven hundred twenty-three thousand, four hundred sixty-one".