20421154104030 has 224 divisors, whose sum is σ = 55926791884800. Its totient is φ = 5365411586496.

The previous prime is 20421154104023. The next prime is 20421154104193. The reversal of 20421154104030 is 3040145112402.

20421154104030 is a `hidden beast` number, since 2 + 0 + 4 + 211 + 5 + 41 + 0 + 403 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20421154103985 and 20421154104003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 275823877 + ... + 275897903.

Almost surely, 2^{20421154104030} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20421154104030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27963395942400).

20421154104030 is an abundant number, since it is smaller than the sum of its proper divisors (35505637780770).

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

20421154104030 is an equidigital number, since it uses as much as digits as its factorization.

20421154104030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74610 (or 74595 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 20421154104030 its reverse (3040145112402), we get a palindrome (23461299216432).

The spelling of 20421154104030 in words is "twenty trillion, four hundred twenty-one billion, one hundred fifty-four million, one hundred four thousand, thirty".