20992254 has 8 divisors (see below), whose sum is σ = 41984520. Its totient is φ = 6997416.

The previous prime is 20992253. The next prime is 20992267. The reversal of 20992254 is 45229902.

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

20992254 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20992253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1749349 + ... + 1749360.

It is an arithmetic number, because the mean of its divisors is an integer number (5248065).

Almost surely, 2^20992254 is an apocalyptic number.

20992254 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20992254 is a wasteful number, since it uses less digits than its factorization.

20992254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3498714.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 20992254 is about 4581.7304591169. The cubic root of 20992254 is about 275.8584918369.

The spelling of 20992254 in words is "twenty million, nine hundred ninety-two thousand, two hundred fifty-four".