21445505400130 has 32 divisors (see below), whose sum is σ = 44227592914176. Its totient is φ = 7334223931584.

The previous prime is 21445505400103. The next prime is 21445505400139. The reversal of 21445505400130 is 3100450554412.

It is not an unprimeable number, because it can be changed into a prime (21445505400139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385821534 + ... + 385877113.

It is an arithmetic number, because the mean of its divisors is an integer number (1382112278568).

Almost surely, 2^{21445505400130} is an apocalyptic number.

21445505400130 is an abundant number, since it is smaller than the sum of its proper divisors (22782087514046).

21445505400130 is a wasteful number, since it uses less digits than its factorization.

21445505400130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771699058.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 21445505400130 its reverse (3100450554412), we get a palindrome (24545955954542).

The spelling of 21445505400130 in words is "twenty-one trillion, four hundred forty-five billion, five hundred five million, four hundred thousand, one hundred thirty".