20498567540 has 24 divisors (see below), whose sum is σ = 46960355232. Its totient is φ = 7454024480.

The previous prime is 20498567521. The next prime is 20498567569. The reversal of 20498567540 is 4576589402.

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, 46587434 + ... + 46587873.

It is an arithmetic number, because the mean of its divisors is an integer number (1956681468).

Almost surely, 2^20498567540 is an apocalyptic number.

20498567540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20498567540 is an abundant number, since it is smaller than the sum of its proper divisors (26461787692).

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

20498567540 is a wasteful number, since it uses less digits than its factorization.

20498567540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93175327 (or 93175325 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 20498567540 in words is "twenty billion, four hundred ninety-eight million, five hundred sixty-seven thousand, five hundred forty".