20221434 has 32 divisors (see below), whose sum is σ = 47304000. Its totient is φ = 6385392.

The previous prime is 20221433. The next prime is 20221441. The reversal of 20221434 is 43412202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20221433) 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, 8829 + ... + 10880.

It is an arithmetic number, because the mean of its divisors is an integer number (1478250).

Almost surely, 2^20221434 is an apocalyptic number.

20221434 is an abundant number, since it is smaller than the sum of its proper divisors (27082566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20221434 is a wasteful number, since it uses less digits than its factorization.

20221434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19739 (or 19733 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20221434 is about 4496.8248798458. The cubic root of 20221434 is about 272.4398610378.

Adding to 20221434 its reverse (43412202), we get a palindrome (63633636).

The spelling of 20221434 in words is "twenty million, two hundred twenty-one thousand, four hundred thirty-four".