20466728828 has 48 divisors (see below), whose sum is σ = 45157393344. Its totient is φ = 7899240960.

The previous prime is 20466728813. The next prime is 20466728837. The reversal of 20466728828 is 82882766402.

It is a self number, because there is not a number n which added to its sum of digits gives 20466728828.

It is a congruent number.

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, 670775 + ... + 700622.

It is an arithmetic number, because the mean of its divisors is an integer number (940779028).

Almost surely, 2^20466728828 is an apocalyptic number.

20466728828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20466728828 is an abundant number, since it is smaller than the sum of its proper divisors (24690664516).

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

20466728828 is a wasteful number, since it uses less digits than its factorization.

20466728828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371462 (or 1371460 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 53.

The spelling of 20466728828 in words is "twenty billion, four hundred sixty-six million, seven hundred twenty-eight thousand, eight hundred twenty-eight".