20021202134 has 4 divisors (see below), whose sum is σ = 30031803204. Its totient is φ = 10010601066.

The previous prime is 20021202133. The next prime is 20021202151. The reversal of 20021202134 is 43120212002.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021202133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005300532 + ... + 5005300535.

It is an arithmetic number, because the mean of its divisors is an integer number (7507950801).

Almost surely, 2^20021202134 is an apocalyptic number.

20021202134 is a deficient number, since it is larger than the sum of its proper divisors (10010601070).

20021202134 is a wasteful number, since it uses less digits than its factorization.

20021202134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010601069.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20021202134 its reverse (43120212002), we get a palindrome (63141414136).

The spelling of 20021202134 in words is "twenty billion, twenty-one million, two hundred two thousand, one hundred thirty-four".