20421513200 has 120 divisors (see below), whose sum is σ = 54054035856. Its totient is φ = 7352320000.

The previous prime is 20421513199. The next prime is 20421513223. The reversal of 20421513200 is 231512402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 421424 + ... + 467376.

Almost surely, 2^20421513200 is an apocalyptic number.

20421513200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20421513200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27027017928).

20421513200 is an abundant number, since it is smaller than the sum of its proper divisors (33632522656).

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

20421513200 is a wasteful number, since it uses less digits than its factorization.

20421513200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46083 (or 46072 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The spelling of 20421513200 in words is "twenty billion, four hundred twenty-one million, five hundred thirteen thousand, two hundred".