20548751244 has 24 divisors (see below), whose sum is σ = 54796670208. Its totient is φ = 5871071760.

The previous prime is 20548751243. The next prime is 20548751261. The reversal of 20548751244 is 44215784502.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 20548751196 and 20548751205.

It is not an unprimeable number, because it can be changed into a prime (20548751243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122313912 + ... + 122314079.

It is an arithmetic number, because the mean of its divisors is an integer number (2283194592).

Almost surely, 2^20548751244 is an apocalyptic number.

It is an amenable number.

20548751244 is an abundant number, since it is smaller than the sum of its proper divisors (34247918964).

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

20548751244 is a wasteful number, since it uses less digits than its factorization.

20548751244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244628005 (or 244628003 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 42.

The spelling of 20548751244 in words is "twenty billion, five hundred forty-eight million, seven hundred fifty-one thousand, two hundred forty-four".