20723087 has 8 divisors (see below), whose sum is σ = 25836672. Its totient is φ = 16147800.

The previous prime is 20723083. The next prime is 20723107. The reversal of 20723087 is 78032702.

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 20723087 - 2² = 20723083 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 (20723083) 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, 134489 + ... + 134642.

It is an arithmetic number, because the mean of its divisors is an integer number (3229584).

Almost surely, 2^20723087 is an apocalyptic number.

20723087 is a deficient number, since it is larger than the sum of its proper divisors (5113585).

20723087 is a wasteful number, since it uses less digits than its factorization.

20723087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269149.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 20723087 is about 4552.2617455502. The cubic root of 20723087 is about 274.6743782266.

Adding to 20723087 its reverse (78032702), we get a palindrome (98755789).

The spelling of 20723087 in words is "twenty million, seven hundred twenty-three thousand, eighty-seven".