20211332 has 6 divisors (see below), whose sum is σ = 35369838. Its totient is φ = 10105664.

The previous prime is 20211263. The next prime is 20211377. The reversal of 20211332 is 23311202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15476356 + 4734976 = 3934^2 + 2176^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2526413 + ... + 2526420.

It is an arithmetic number, because the mean of its divisors is an integer number (5894973).

Almost surely, 2^20211332 is an apocalyptic number.

It is an amenable number.

20211332 is a deficient number, since it is larger than the sum of its proper divisors (15158506).

20211332 is a wasteful number, since it uses less digits than its factorization.

20211332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5052837 (or 5052835 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20211332 is about 4495.7015025466. The cubic root of 20211332 is about 272.3944859850.

Adding to 20211332 its reverse (23311202), we get a palindrome (43522534).

The spelling of 20211332 in words is "twenty million, two hundred eleven thousand, three hundred thirty-two".