20021433332 has 6 divisors (see below), whose sum is σ = 35037508338. Its totient is φ = 10010716664.

The previous prime is 20021433317. The next prime is 20021433343. The reversal of 20021433332 is 23333412002.

It can be written as a sum of positive squares in only one way, i.e., 13692276196 + 6329157136 = 117014^2 + 79556^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20021433298 and 20021433307.

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, 2502679163 + ... + 2502679170.

It is an arithmetic number, because the mean of its divisors is an integer number (5839584723).

Almost surely, 2^20021433332 is an apocalyptic number.

It is an amenable number.

20021433332 is a deficient number, since it is larger than the sum of its proper divisors (15016075006).

20021433332 is a wasteful number, since it uses less digits than its factorization.

20021433332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5005358337 (or 5005358335 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 20021433332 its reverse (23333412002), we get a palindrome (43354845334).

The spelling of 20021433332 in words is "twenty billion, twenty-one million, four hundred thirty-three thousand, three hundred thirty-two".