20551053004 has 12 divisors (see below), whose sum is σ = 35966148064. Its totient is φ = 10275010704.

The previous prime is 20551052999. The next prime is 20551053037. The reversal of 20551053004 is 40035015502.

It is a self number, because there is not a number n which added to its sum of digits gives 20551053004.

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, 31044 + ... + 205099.

Almost surely, 2^20551053004 is an apocalyptic number.

It is an amenable number.

20551053004 is a deficient number, since it is larger than the sum of its proper divisors (15415095060).

20551053004 is a wasteful number, since it uses less digits than its factorization.

20551053004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257904 (or 257902 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 20551053004 its reverse (40035015502), we get a palindrome (60586068506).

The spelling of 20551053004 in words is "twenty billion, five hundred fifty-one million, fifty-three thousand, four".