20790529290 has 48 divisors (see below), whose sum is σ = 54211236768. Its totient is φ = 5528155488.

The previous prime is 20790529259. The next prime is 20790529337. The reversal of 20790529290 is 9292509702.

It is a happy number.

It is a super-2 number, since 2×20790529290² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 301632 + ... + 364091.

It is an arithmetic number, because the mean of its divisors is an integer number (1129400766).

Almost surely, 2^20790529290 is an apocalyptic number.

20790529290 is an abundant number, since it is smaller than the sum of its proper divisors (33420707478).

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

20790529290 is a wasteful number, since it uses less digits than its factorization.

20790529290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666083 (or 666080 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 20790529290 in words is "twenty billion, seven hundred ninety million, five hundred twenty-nine thousand, two hundred ninety".