21230004073700 has 18 divisors (see below), whose sum is σ = 46069108840146. Its totient is φ = 8492001629440.

The previous prime is 21230004073639. The next prime is 21230004073703. The reversal of 21230004073700 is 737040003212.

It can be written as a sum of positive squares in 3 ways, for example, as 132223867876 + 21097780205824 = 363626^2 + 4593232^2 .

It is not an unprimeable number, because it can be changed into a prime (21230004073703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106150020269 + ... + 106150020468.

Almost surely, 2^{21230004073700} is an apocalyptic number.

21230004073700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230004073700 is an abundant number, since it is smaller than the sum of its proper divisors (24839104766446).

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

21230004073700 is a wasteful number, since it uses less digits than its factorization.

21230004073700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212300040751 (or 212300040744 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 29.

Adding to 21230004073700 its reverse (737040003212), we get a palindrome (21967044076912).

The spelling of 21230004073700 in words is "twenty-one trillion, two hundred thirty billion, four million, seventy-three thousand, seven hundred".