20202121432 has 8 divisors (see below), whose sum is σ = 37878977700. Its totient is φ = 10101060712.

The previous prime is 20202121427. The next prime is 20202121439. The reversal of 20202121432 is 23412120202.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202121439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262632582 + ... + 1262632597.

Almost surely, 2^20202121432 is an apocalyptic number.

It is an amenable number.

20202121432 is a deficient number, since it is larger than the sum of its proper divisors (17676856268).

20202121432 is a wasteful number, since it uses less digits than its factorization.

20202121432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525265185 (or 2525265181 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20202121432 its reverse (23412120202), we get a palindrome (43614241634).

The spelling of 20202121432 in words is "twenty billion, two hundred two million, one hundred twenty-one thousand, four hundred thirty-two".