20421154260200 has 48 divisors (see below), whose sum is σ = 47480172151500. Its totient is φ = 8168291640320.

The previous prime is 20421154260019. The next prime is 20421154260229. The reversal of 20421154260200 is 206245112402.

It can be written as a sum of positive squares in 6 ways, for example, as 11557946491204 + 8863207768996 = 3399698^2 + 2977114^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8795486 + ... + 10872114.

Almost surely, 2^{20421154260200} is an apocalyptic number.

20421154260200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20421154260200 is an abundant number, since it is smaller than the sum of its proper divisors (27059017891300).

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

20421154260200 is a wasteful number, since it uses less digits than its factorization.

20421154260200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125814 (or 2125805 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 20421154260200 its reverse (206245112402), we get a palindrome (20627399372602).

The spelling of 20421154260200 in words is "twenty trillion, four hundred twenty-one billion, one hundred fifty-four million, two hundred sixty thousand, two hundred".