20531422730 has 32 divisors (see below), whose sum is σ = 45485000064. Its totient is φ = 6497856576.

The previous prime is 20531422679. The next prime is 20531422741. The reversal of 20531422730 is 3722413502.

It is a junction number, because it is equal to n+sod(n) for n = 20531422693 and 20531422702.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11280092 + ... + 11281911.

It is an arithmetic number, because the mean of its divisors is an integer number (1421406252).

Almost surely, 2^20531422730 is an apocalyptic number.

20531422730 is an abundant number, since it is smaller than the sum of its proper divisors (24953577334).

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

20531422730 is a wasteful number, since it uses less digits than its factorization.

20531422730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22562030.

The product of its (nonzero) digits is 10080, while the sum is 29.

The spelling of 20531422730 in words is "twenty billion, five hundred thirty-one million, four hundred twenty-two thousand, seven hundred thirty".