20245146642 has 90 divisors (see below), whose sum is σ = 52803576837. Its totient is φ = 5780705616.

The previous prime is 20245146631. The next prime is 20245146671. The reversal of 20245146642 is 24664154202.

20245146642 is a `hidden beast` number, since 2 + 0 + 2 + 4 + 5 + 1 + 4 + 6 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18227430081 + 2017716561 = 135009^2 + 44919^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=100611.

It is a junction number, because it is equal to n+sod(n) for n = 20245146597 and 20245146606.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 12676188 + ... + 12677784.

Almost surely, 2^20245146642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20245146642

20245146642 is an abundant number, since it is smaller than the sum of its proper divisors (32558430195).

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

20245146642 is an frugal number, since it uses more digits than its factorization.

20245146642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The spelling of 20245146642 in words is "twenty billion, two hundred forty-five million, one hundred forty-six thousand, six hundred forty-two".