20547762420 has 96 divisors (see below), whose sum is σ = 61970388480. Its totient is φ = 5070280320.

The previous prime is 20547762397. The next prime is 20547762421. The reversal of 20547762420 is 2426774502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20547762421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160566 + ... + 258605.

It is an arithmetic number, because the mean of its divisors is an integer number (645524880).

Almost surely, 2^20547762420 is an apocalyptic number.

20547762420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20547762420 is an abundant number, since it is smaller than the sum of its proper divisors (41422626060).

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

20547762420 is a wasteful number, since it uses less digits than its factorization.

20547762420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419245 (or 419243 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 39.

The spelling of 20547762420 in words is "twenty billion, five hundred forty-seven million, seven hundred sixty-two thousand, four hundred twenty".