20611229143830 has 384 divisors, whose sum is σ = 55256396323968. Its totient is φ = 4889518276608.

The previous prime is 20611229143829. The next prime is 20611229143877. The reversal of 20611229143830 is 3834192211602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 80199335062 + ... + 80199335318.

It is an arithmetic number, because the mean of its divisors is an integer number (143896865427).

Almost surely, 2^{20611229143830} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20611229143830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27628198161984).

20611229143830 is an abundant number, since it is smaller than the sum of its proper divisors (34645167180138).

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

20611229143830 is a wasteful number, since it uses less digits than its factorization.

20611229143830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 20611229143830 in words is "twenty trillion, six hundred eleven billion, two hundred twenty-nine million, one hundred forty-three thousand, eight hundred thirty".