20628248842 has 8 divisors (see below), whose sum is σ = 31940514432. Its totient is φ = 9981410700.

The previous prime is 20628248821. The next prime is 20628248857. The reversal of 20628248842 is 24884282602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×20628248842³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20628248792 and 20628248801.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166356784 + ... + 166356907.

It is an arithmetic number, because the mean of its divisors is an integer number (3992564304).

Almost surely, 2^20628248842 is an apocalyptic number.

20628248842 is a deficient number, since it is larger than the sum of its proper divisors (11312265590).

20628248842 is a wasteful number, since it uses less digits than its factorization.

20628248842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332713724.

The product of its (nonzero) digits is 786432, while the sum is 46.

The spelling of 20628248842 in words is "twenty billion, six hundred twenty-eight million, two hundred forty-eight thousand, eight hundred forty-two".