20021203052 has 12 divisors (see below), whose sum is σ = 35984054400. Its totient is φ = 9740044656.

The previous prime is 20021203003. The next prime is 20021203061. The reversal of 20021203052 is 25030212002.

It is a super-2 number, since 2×20021203052² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20021203052.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67639052 + ... + 67639347.

It is an arithmetic number, because the mean of its divisors is an integer number (2998671200).

Almost surely, 2^20021203052 is an apocalyptic number.

It is an amenable number.

20021203052 is a deficient number, since it is larger than the sum of its proper divisors (15962851348).

20021203052 is a wasteful number, since it uses less digits than its factorization.

20021203052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135278440 (or 135278438 counting only the distinct ones).

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

Adding to 20021203052 its reverse (25030212002), we get a palindrome (45051415054).

The spelling of 20021203052 in words is "twenty billion, twenty-one million, two hundred three thousand, fifty-two".