20854797504 has 112 divisors (see below), whose sum is σ = 55638240768. Its totient is φ = 6893928448.

The previous prime is 20854797503. The next prime is 20854797517. The reversal of 20854797504 is 40579745802.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20854797503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12976669 + ... + 12978275.

Almost surely, 2^20854797504 is an apocalyptic number.

20854797504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20854797504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27819120384).

20854797504 is an abundant number, since it is smaller than the sum of its proper divisors (34783443264).

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

20854797504 is a wasteful number, since it uses less digits than its factorization.

20854797504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142 (or 2132 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 20854797504 in words is "twenty billion, eight hundred fifty-four million, seven hundred ninety-seven thousand, five hundred four".