20154420200 has 24 divisors (see below), whose sum is σ = 46859027430. Its totient is φ = 8061768000.

The previous prime is 20154420163. The next prime is 20154420241. The reversal of 20154420200 is 202445102.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 19100898436 + 1053521764 = 138206^2 + 32458^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50385851 + ... + 50386250.

Almost surely, 2^20154420200 is an apocalyptic number.

20154420200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20154420200 is an abundant number, since it is smaller than the sum of its proper divisors (26704607230).

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

20154420200 is a wasteful number, since it uses less digits than its factorization.

20154420200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100772117 (or 100772108 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 20154420200 its reverse (202445102), we get a palindrome (20356865302).

The spelling of 20154420200 in words is "twenty billion, one hundred fifty-four million, four hundred twenty thousand, two hundred".