20187422 has 32 divisors (see below), whose sum is σ = 33652800. Its totient is φ = 9047808.

The previous prime is 20187421. The next prime is 20187467. The reversal of 20187422 is 22478102.

It is a junction number, because it is equal to n+sod(n) for n = 20187391 and 20187400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20187421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49154 + ... + 49562.

It is an arithmetic number, because the mean of its divisors is an integer number (1051650).

Almost surely, 2^20187422 is an apocalyptic number.

20187422 is a deficient number, since it is larger than the sum of its proper divisors (13465378).

20187422 is a wasteful number, since it uses less digits than its factorization.

20187422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 20187422 is about 4493.0415088223. The cubic root of 20187422 is about 272.2870294004.

The spelling of 20187422 in words is "twenty million, one hundred eighty-seven thousand, four hundred twenty-two".