20189051 has 4 divisors (see below), whose sum is σ = 20202504. Its totient is φ = 20175600.

The previous prime is 20189023. The next prime is 20189069. The reversal of 20189051 is 15098102.

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 20189051 - 2¹⁴ = 20172667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20189051.

It is not an unprimeable number, because it can be changed into a prime (20189011) 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, 4145 + ... + 7586.

It is an arithmetic number, because the mean of its divisors is an integer number (5050626).

Almost surely, 2^20189051 is an apocalyptic number.

20189051 is a deficient number, since it is larger than the sum of its proper divisors (13453).

20189051 is a wasteful number, since it uses less digits than its factorization.

20189051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13452.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 20189051 is about 4493.2227854848. Note that the first 3 decimals coincide. The cubic root of 20189051 is about 272.2943531627.

The spelling of 20189051 in words is "twenty million, one hundred eighty-nine thousand, fifty-one".