20512005532000 has 96 divisors (see below), whose sum is σ = 50559016644864. Its totient is φ = 8178588288000.

The previous prime is 20512005531947. The next prime is 20512005532001. The reversal of 20512005532000 is 23550021502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512005532001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6939696 + ... + 9443695.

It is an arithmetic number, because the mean of its divisors is an integer number (526656423384).

Almost surely, 2^{20512005532000} is an apocalyptic number.

20512005532000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20512005532000 is an abundant number, since it is smaller than the sum of its proper divisors (30047011112864).

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

20512005532000 is a wasteful number, since it uses less digits than its factorization.

20512005532000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16383729 (or 16383711 counting only the distinct ones).

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

Adding to 20512005532000 its reverse (23550021502), we get a palindrome (20535555553502).

The spelling of 20512005532000 in words is "twenty trillion, five hundred twelve billion, five million, five hundred thirty-two thousand".