20447954 has 8 divisors (see below), whose sum is σ = 30729648. Its totient is φ = 10204740.

The previous prime is 20447953. The next prime is 20447969. The reversal of 20447954 is 45974402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20447954² = 836237645572232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20447951) 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, 8252 + ... + 10439.

It is an arithmetic number, because the mean of its divisors is an integer number (3841206).

Almost surely, 2^20447954 is an apocalyptic number.

20447954 is a deficient number, since it is larger than the sum of its proper divisors (10281694).

20447954 is a wasteful number, since it uses less digits than its factorization.

20447954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19240.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 20447954 is about 4521.9413972319. The cubic root of 20447954 is about 273.4533741358.

The spelling of 20447954 in words is "twenty million, four hundred forty-seven thousand, nine hundred fifty-four".