22087947 has 16 divisors (see below), whose sum is σ = 35638272. Its totient is φ = 11879040.

The previous prime is 22087943. The next prime is 22087951. The reversal of 22087947 is 74978022.

It is an interprime number because it is at equal distance from previous prime (22087943) and next prime (22087951).

It is not a de Polignac number, because 22087947 - 2² = 22087943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22087943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30579 + ... + 31292.

It is an arithmetic number, because the mean of its divisors is an integer number (2227392).

Almost surely, 2^22087947 is an apocalyptic number.

22087947 is a deficient number, since it is larger than the sum of its proper divisors (13550325).

22087947 is a wasteful number, since it uses less digits than its factorization.

22087947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61898.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 22087947 is about 4699.7815906699. The cubic root of 22087947 is about 280.5768168589.

The spelling of 22087947 in words is "twenty-two million, eighty-seven thousand, nine hundred forty-seven".