20545142124 has 48 divisors (see below), whose sum is σ = 54663100128. Its totient is φ = 5949723648.

The previous prime is 20545142113. The next prime is 20545142147. The reversal of 20545142124 is 42124154502.

It is a junction number, because it is equal to n+sod(n) for n = 20545142091 and 20545142100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3870867 + ... + 3876170.

It is an arithmetic number, because the mean of its divisors is an integer number (1138814586).

Almost surely, 2^20545142124 is an apocalyptic number.

It is an amenable number.

20545142124 is an abundant number, since it is smaller than the sum of its proper divisors (34117958004).

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

20545142124 is a wasteful number, since it uses less digits than its factorization.

20545142124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7747074 (or 7747072 counting only the distinct ones).

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

Adding to 20545142124 its reverse (42124154502), we get a palindrome (62669296626).

The spelling of 20545142124 in words is "twenty billion, five hundred forty-five million, one hundred forty-two thousand, one hundred twenty-four".