19473421636900 has 405 divisors, whose sum is σ = 54175776138435. Its totient is φ = 6057987936000.

The previous prime is 19473421636861. The next prime is 19473421636913. The reversal of 19473421636900 is 963612437491.

The square root of 19473421636900 is 4412870.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2444726127844 + 17028695509056 = 1563562^2 + 4126584^2 .

It is a super-2 number, since 2×19473421636900² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 37377008640 + ... + 37377009160.

Almost surely, 2^{19473421636900} is an apocalyptic number.

19473421636900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19473421636900 is the 4412870-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19473421636900

19473421636900 is an abundant number, since it is smaller than the sum of its proper divisors (34702354501535).

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

19473421636900 is an frugal number, since it uses more digits than its factorization.

19473421636900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 55.

The spelling of 19473421636900 in words is "nineteen trillion, four hundred seventy-three billion, four hundred twenty-one million, six hundred thirty-six thousand, nine hundred".