18970121600 has 192 divisors, whose sum is σ = 48011175600. Its totient is φ = 7404134400.

The previous prime is 18970121587. The next prime is 18970121603. The reversal of 18970121600 is 612107981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18970121603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30646091 + ... + 30646709.

Almost surely, 2^18970121600 is an apocalyptic number.

18970121600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18970121600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24005587800).

18970121600 is an abundant number, since it is smaller than the sum of its proper divisors (29041054000).

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

18970121600 is a wasteful number, since it uses less digits than its factorization.

18970121600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 35.

The spelling of 18970121600 in words is "eighteen billion, nine hundred seventy million, one hundred twenty-one thousand, six hundred".