20554243700 has 144 divisors (see below), whose sum is σ = 48842707200. Its totient is φ = 7480512000.

The previous prime is 20554243691. The next prime is 20554243727. The reversal of 20554243700 is 734245502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5551850 + ... + 5555550.

Almost surely, 2^20554243700 is an apocalyptic number.

20554243700 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 20554243700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24421353600).

20554243700 is an abundant number, since it is smaller than the sum of its proper divisors (28288463500).

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

20554243700 is a wasteful number, since it uses less digits than its factorization.

20554243700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3850 (or 3843 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 32.

The spelling of 20554243700 in words is "twenty billion, five hundred fifty-four million, two hundred forty-three thousand, seven hundred".