20307706542 has 48 divisors (see below), whose sum is σ = 45224047440. Its totient is φ = 6583420800.

The previous prime is 20307706487. The next prime is 20307706543. The reversal of 20307706542 is 24560770302.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20307706497 and 20307706506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20307706543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6184 + ... + 201627.

It is an arithmetic number, because the mean of its divisors is an integer number (942167655).

Almost surely, 2^20307706542 is an apocalyptic number.

20307706542 is an abundant number, since it is smaller than the sum of its proper divisors (24916340898).

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

20307706542 is a wasteful number, since it uses less digits than its factorization.

20307706542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207969 (or 207966 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The spelling of 20307706542 in words is "twenty billion, three hundred seven million, seven hundred six thousand, five hundred forty-two".