20426588562402 has 128 divisors (see below), whose sum is σ = 50991563059200. Its totient is φ = 6006688228800.

The previous prime is 20426588562323. The next prime is 20426588562463.

20426588562402 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 6 + 5 + 8 + 8 + 5 + 624 + 0 + 2 = 666.

20426588562402 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7103527 + ... + 9555797.

It is an arithmetic number, because the mean of its divisors is an integer number (398371586400).

Almost surely, 2^{20426588562402} is an apocalyptic number.

20426588562402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20426588562402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25495781529600).

20426588562402 is an abundant number, since it is smaller than the sum of its proper divisors (30564974496798).

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

20426588562402 is a wasteful number, since it uses less digits than its factorization.

20426588562402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452709 (or 2452703 counting only the distinct ones).

The product of its (nonzero) digits is 14745600, while the sum is 54.

The spelling of 20426588562402 in words is "twenty trillion, four hundred twenty-six billion, five hundred eighty-eight million, five hundred sixty-two thousand, four hundred two".