20645701362 has 112 divisors (see below), whose sum is σ = 54549548928. Its totient is φ = 5774963040.

The previous prime is 20645701343. The next prime is 20645701369. The reversal of 20645701362 is 26310754602.

20645701362 is a `hidden beast` number, since 2 + 0 + 645 + 7 + 0 + 1 + 3 + 6 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (20645701369) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 158983 + ... + 258005.

It is an arithmetic number, because the mean of its divisors is an integer number (487049544).

Almost surely, 2^20645701362 is an apocalyptic number.

20645701362 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 20645701362, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27274774464).

20645701362 is an abundant number, since it is smaller than the sum of its proper divisors (33903847566).

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

20645701362 is a wasteful number, since it uses less digits than its factorization.

20645701362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99067 (or 99052 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 20645701362 in words is "twenty billion, six hundred forty-five million, seven hundred one thousand, three hundred sixty-two".