20451541224 has 32 divisors (see below), whose sum is σ = 51198084000. Its totient is φ = 6807949632.

The previous prime is 20451541217. The next prime is 20451541241. The reversal of 20451541224 is 42214515402.

It is a junction number, because it is equal to n+sod(n) for n = 20451541191 and 20451541200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558819 + ... + 594290.

It is an arithmetic number, because the mean of its divisors is an integer number (1599940125).

Almost surely, 2^20451541224 is an apocalyptic number.

20451541224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20451541224 is an abundant number, since it is smaller than the sum of its proper divisors (30746542776).

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

20451541224 is a wasteful number, since it uses less digits than its factorization.

20451541224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153857 (or 1153853 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

The spelling of 20451541224 in words is "twenty billion, four hundred fifty-one million, five hundred forty-one thousand, two hundred twenty-four".