20221532 has 6 divisors (see below), whose sum is σ = 35387688. Its totient is φ = 10110764.

The previous prime is 20221489. The next prime is 20221541. The reversal of 20221532 is 23512202.

It is a self number, because there is not a number n which added to its sum of digits gives 20221532.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2527688 + ... + 2527695.

It is an arithmetic number, because the mean of its divisors is an integer number (5897948).

Almost surely, 2^20221532 is an apocalyptic number.

It is an amenable number.

20221532 is a deficient number, since it is larger than the sum of its proper divisors (15166156).

20221532 is a wasteful number, since it uses less digits than its factorization.

20221532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5055387 (or 5055385 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20221532 is about 4496.8357764099. The cubic root of 20221532 is about 272.4403011494.

Adding to 20221532 its reverse (23512202), we get a palindrome (43733734).

The spelling of 20221532 in words is "twenty million, two hundred twenty-one thousand, five hundred thirty-two".