20541233240 has 32 divisors (see below), whose sum is σ = 50419391760. Its totient is φ = 7469539200.

The previous prime is 20541233239. The next prime is 20541233287. The reversal of 20541233240 is 4233214502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23341871 + ... + 23342750.

Almost surely, 2^20541233240 is an apocalyptic number.

20541233240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20541233240 is an abundant number, since it is smaller than the sum of its proper divisors (29878158520).

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

20541233240 is a wasteful number, since it uses less digits than its factorization.

20541233240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46684643 (or 46684639 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 20541233240 its reverse (4233214502), we get a palindrome (24774447742).

The spelling of 20541233240 in words is "twenty billion, five hundred forty-one million, two hundred thirty-three thousand, two hundred forty".