20405420103252 has 24 divisors (see below), whose sum is σ = 48719917767136. Its totient is φ = 6643625149728.

The previous prime is 20405420103193. The next prime is 20405420103253. The reversal of 20405420103252 is 25230102450402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20405420103253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19772693383 + ... + 19772694414.

Almost surely, 2^{20405420103252} is an apocalyptic number.

It is an amenable number.

20405420103252 is an abundant number, since it is smaller than the sum of its proper divisors (28314497663884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20405420103252 is a wasteful number, since it uses less digits than its factorization.

20405420103252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39545387847 (or 39545387845 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 20405420103252 its reverse (25230102450402), we get a palindrome (45635522553654).

The spelling of 20405420103252 in words is "twenty trillion, four hundred five billion, four hundred twenty million, one hundred three thousand, two hundred fifty-two".