20712467 has 4 divisors (see below), whose sum is σ = 21426720. Its totient is φ = 19998216.

The previous prime is 20712449. The next prime is 20712469. The reversal of 20712467 is 76421702.

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 20712467 - 2⁶ = 20712403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 714223 = 20712467 / (2 + 0 + 7 + 1 + 2 + 4 + 6 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20712469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357083 + ... + 357140.

It is an arithmetic number, because the mean of its divisors is an integer number (5356680).

Almost surely, 2^20712467 is an apocalyptic number.

20712467 is a deficient number, since it is larger than the sum of its proper divisors (714253).

20712467 is an equidigital number, since it uses as much as digits as its factorization.

20712467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714252.

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

The square root of 20712467 is about 4551.0951429299. The cubic root of 20712467 is about 274.6274492412.

The spelling of 20712467 in words is "twenty million, seven hundred twelve thousand, four hundred sixty-seven".