20514011440 has 40 divisors (see below), whose sum is σ = 51363931248. Its totient is φ = 7574403840.

The previous prime is 20514011429. The next prime is 20514011467. The reversal of 20514011440 is 4411041502.

It is a tau number, because it is divible by the number of its divisors (40).

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, 9861466 + ... + 9863545.

Almost surely, 2^20514011440 is an apocalyptic number.

20514011440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20514011440 is an abundant number, since it is smaller than the sum of its proper divisors (30849919808).

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

20514011440 is a wasteful number, since it uses less digits than its factorization.

20514011440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19725037 (or 19725031 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 20514011440 its reverse (4411041502), we get a palindrome (24925052942).

The spelling of 20514011440 in words is "twenty billion, five hundred fourteen million, eleven thousand, four hundred forty".