29820757530 has 32 divisors (see below), whose sum is σ = 72307658304. Its totient is φ = 7870219776.

The previous prime is 29820757529. The next prime is 29820757537. The reversal of 29820757530 is 3575702892.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 29820757530.

It is not an unprimeable number, because it can be changed into a prime (29820757537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5120932 + ... + 5126751.

It is an arithmetic number, because the mean of its divisors is an integer number (2259614322).

Almost surely, 2^29820757530 is an apocalyptic number.

29820757530 is an abundant number, since it is smaller than the sum of its proper divisors (42486900774).

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

29820757530 is a wasteful number, since it uses less digits than its factorization.

29820757530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10247790.

The product of its (nonzero) digits is 1058400, while the sum is 48.

The spelling of 29820757530 in words is "twenty-nine billion, eight hundred twenty million, seven hundred fifty-seven thousand, five hundred thirty".