20623867 has 8 divisors (see below), whose sum is σ = 22816512. Its totient is φ = 18484200.

The previous prime is 20623859. The next prime is 20623871. The reversal of 20623867 is 76832602.

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 20623867 - 2³ = 20623859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20623807) 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, 12423 + ... + 13984.

It is an arithmetic number, because the mean of its divisors is an integer number (2852064).

Almost surely, 2^20623867 is an apocalyptic number.

20623867 is a deficient number, since it is larger than the sum of its proper divisors (2192645).

20623867 is a wasteful number, since it uses less digits than its factorization.

20623867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26489.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 20623867 is about 4541.3507902385. The cubic root of 20623867 is about 274.2353058846.

It can be divided in two parts, 2062 and 3867, that added together give a square (5929 = 77²).

The spelling of 20623867 in words is "twenty million, six hundred twenty-three thousand, eight hundred sixty-seven".