20938154 has 8 divisors (see below), whose sum is σ = 31450788. Its totient is φ = 10454560.

The previous prime is 20938117. The next prime is 20938193. The reversal of 20938154 is 45183902.

It can be written as a sum of positive squares in 2 ways, for example, as 13126129 + 7812025 = 3623^2 + 2795^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20938154.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5357 + ... + 8400.

Almost surely, 2^20938154 is an apocalyptic number.

20938154 is a deficient number, since it is larger than the sum of its proper divisors (10512634).

20938154 is a wasteful number, since it uses less digits than its factorization.

20938154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14520.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 20938154 is about 4575.8227675468. The cubic root of 20938154 is about 275.6213125553.

The spelling of 20938154 in words is "twenty million, nine hundred thirty-eight thousand, one hundred fifty-four".