20531140450 has 24 divisors (see below), whose sum is σ = 38265742800. Its totient is φ = 8195720400.

The previous prime is 20531140447. The next prime is 20531140451. The reversal of 20531140450 is 5404113502.

It is a happy number.

It is a super-3 number, since 3×20531140450³ (a number of 32 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (20531140451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 393600 + ... + 442699.

It is an arithmetic number, because the mean of its divisors is an integer number (1594405950).

Almost surely, 2^20531140450 is an apocalyptic number.

20531140450 is a deficient number, since it is larger than the sum of its proper divisors (17734602350).

20531140450 is a wasteful number, since it uses less digits than its factorization.

20531140450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836802 (or 836797 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20531140450 its reverse (5404113502), we get a palindrome (25935253952).

The spelling of 20531140450 in words is "twenty billion, five hundred thirty-one million, one hundred forty thousand, four hundred fifty".