20912354 has 8 divisors (see below), whose sum is σ = 31408860. Its totient is φ = 10442736.

The previous prime is 20912351. The next prime is 20912377. The reversal of 20912354 is 45321902.

It can be written as a sum of positive squares in 2 ways, for example, as 20912329 + 25 = 4573^2 + 5^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20912351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4649 + ... + 7964.

Almost surely, 2^20912354 is an apocalyptic number.

20912354 is a deficient number, since it is larger than the sum of its proper divisors (10496506).

20912354 is a wasteful number, since it uses less digits than its factorization.

20912354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13444.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 20912354 is about 4573.0027334346. The cubic root of 20912354 is about 275.5080591360.

The spelling of 20912354 in words is "twenty million, nine hundred twelve thousand, three hundred fifty-four".