20144929530 has 128 divisors (see below), whose sum is σ = 54543476736. Its totient is φ = 4719686400.

The previous prime is 20144929529. The next prime is 20144929537. The reversal of 20144929530 is 3592944102.

It is not an unprimeable number, because it can be changed into a prime (20144929537) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1163235 + ... + 1180425.

It is an arithmetic number, because the mean of its divisors is an integer number (426120912).

Almost surely, 2^20144929530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20144929530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27271738368).

20144929530 is an abundant number, since it is smaller than the sum of its proper divisors (34398547206).

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

20144929530 is a wasteful number, since it uses less digits than its factorization.

20144929530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17332.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 20144929530 in words is "twenty billion, one hundred forty-four million, nine hundred twenty-nine thousand, five hundred thirty".