22146947 has 4 divisors (see below), whose sum is σ = 22350240. Its totient is φ = 21943656.

The previous prime is 22146919. The next prime is 22146961. The reversal of 22146947 is 74964122.

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 22146947 - 2¹⁰ = 22145923 is a prime.

It is a super-2 number, since 2×22146947² = 980974522841618, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (22146997) 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, 101483 + ... + 101700.

It is an arithmetic number, because the mean of its divisors is an integer number (5587560).

Almost surely, 2^22146947 is an apocalyptic number.

22146947 is a deficient number, since it is larger than the sum of its proper divisors (203293).

22146947 is a wasteful number, since it uses less digits than its factorization.

22146947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203292.

The product of its digits is 24192, while the sum is 35.

The square root of 22146947 is about 4706.0542920795. The cubic root of 22146947 is about 280.8264147452.

The spelling of 22146947 in words is "twenty-two million, one hundred forty-six thousand, nine hundred forty-seven".