20426262402 has 288 divisors, whose sum is σ = 54338667264. Its totient is φ = 5094835200.

The previous prime is 20426262343. The next prime is 20426262407.

20426262402 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 20426262402.

It is not an unprimeable number, because it can be changed into a prime (20426262407) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 75373527 + ... + 75373797.

It is an arithmetic number, because the mean of its divisors is an integer number (188675928).

Almost surely, 2^20426262402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20426262402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27169333632).

20426262402 is an abundant number, since it is smaller than the sum of its proper divisors (33912404862).

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

20426262402 is a wasteful number, since it uses less digits than its factorization.

20426262402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The spelling of 20426262402 in words is "twenty billion, four hundred twenty-six million, two hundred sixty-two thousand, four hundred two".