20531054004 has 24 divisors (see below), whose sum is σ = 47946735648. Its totient is φ = 6837835680.

The previous prime is 20531053999. The next prime is 20531054021. The reversal of 20531054004 is 40045013502.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 716487 + ... + 744590.

It is an arithmetic number, because the mean of its divisors is an integer number (1997780652).

Almost surely, 2^20531054004 is an apocalyptic number.

It is an amenable number.

20531054004 is an abundant number, since it is smaller than the sum of its proper divisors (27415681644).

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

20531054004 is a wasteful number, since it uses less digits than its factorization.

20531054004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462255 (or 1462253 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 20531054004 its reverse (40045013502), we get a palindrome (60576067506).

The spelling of 20531054004 in words is "twenty billion, five hundred thirty-one million, fifty-four thousand, four".