20340564020 has 24 divisors (see below), whose sum is σ = 48817353984. Its totient is φ = 6973907616.

The previous prime is 20340564017. The next prime is 20340564029. The reversal of 20340564020 is 2046504302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340564029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72644732 + ... + 72645011.

It is an arithmetic number, because the mean of its divisors is an integer number (2034056416).

Almost surely, 2^20340564020 is an apocalyptic number.

20340564020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20340564020 is an abundant number, since it is smaller than the sum of its proper divisors (28476789964).

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

20340564020 is a wasteful number, since it uses less digits than its factorization.

20340564020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145289759 (or 145289757 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The spelling of 20340564020 in words is "twenty billion, three hundred forty million, five hundred sixty-four thousand, twenty".