20021333474 has 8 divisors (see below), whose sum is σ = 30033745500. Its totient is φ = 10010084976.

The previous prime is 20021333473. The next prime is 20021333533. The reversal of 20021333474 is 47433312002.

It can be written as a sum of positive squares in 2 ways, for example, as 18013666225 + 2007667249 = 134215^2 + 44807^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20021333474² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20021333473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246509 + ... + 317504.

Almost surely, 2^20021333474 is an apocalyptic number.

20021333474 is a deficient number, since it is larger than the sum of its proper divisors (10012412026).

20021333474 is a wasteful number, since it uses less digits than its factorization.

20021333474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581764.

The product of its (nonzero) digits is 12096, while the sum is 29.

Adding to 20021333474 its reverse (47433312002), we get a palindrome (67454645476).

The spelling of 20021333474 in words is "twenty billion, twenty-one million, three hundred thirty-three thousand, four hundred seventy-four".