20119451 has 4 divisors (see below), whose sum is σ = 21948504. Its totient is φ = 18290400.

The previous prime is 20119441. The next prime is 20119459. The reversal of 20119451 is 15491102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20119451 - 2⁶ = 20119387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20119459) by changing a digit.

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, 914510 + ... + 914531.

It is an arithmetic number, because the mean of its divisors is an integer number (5487126).

Almost surely, 2^20119451 is an apocalyptic number.

20119451 is a deficient number, since it is larger than the sum of its proper divisors (1829053).

20119451 is a wasteful number, since it uses less digits than its factorization.

20119451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829052.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 20119451 is about 4485.4711012334. The cubic root of 20119451 is about 271.9810891913.

The spelling of 20119451 in words is "twenty million, one hundred nineteen thousand, four hundred fifty-one".