20357667642 has 32 divisors (see below), whose sum is σ = 43863398208. Its totient is φ = 6261595776.

The previous prime is 20357667619. The next prime is 20357667643. The reversal of 20357667642 is 24676675302.

It is a junction number, because it is equal to n+sod(n) for n = 20357667591 and 20357667600.

It is not an unprimeable number, because it can be changed into a prime (20357667643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172078 + ... + 265190.

It is an arithmetic number, because the mean of its divisors is an integer number (1370731194).

Almost surely, 2^20357667642 is an apocalyptic number.

20357667642 is an abundant number, since it is smaller than the sum of its proper divisors (23505730566).

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

20357667642 is a wasteful number, since it uses less digits than its factorization.

20357667642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95934.

The product of its (nonzero) digits is 2540160, while the sum is 48.

The spelling of 20357667642 in words is "twenty billion, three hundred fifty-seven million, six hundred sixty-seven thousand, six hundred forty-two".