20230640737640 has 64 divisors (see below), whose sum is σ = 46139256357120. Its totient is φ = 7982569440000.

The previous prime is 20230640737631. The next prime is 20230640737649. The reversal of 20230640737640 is 4673704603202.

It is an interprime number because it is at equal distance from previous prime (20230640737631) and next prime (20230640737649).

It is a junction number, because it is equal to n+sod(n) for n = 20230640737591 and 20230640737600.

It is not an unprimeable number, because it can be changed into a prime (20230640737649) 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, 8144246 + ... + 10333925.

It is an arithmetic number, because the mean of its divisors is an integer number (720925880580).

Almost surely, 2^{20230640737640} is an apocalyptic number.

20230640737640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20230640737640 is an abundant number, since it is smaller than the sum of its proper divisors (25908615619480).

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

20230640737640 is a wasteful number, since it uses less digits than its factorization.

20230640737640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18478554 (or 18478550 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 44.

The spelling of 20230640737640 in words is "twenty trillion, two hundred thirty billion, six hundred forty million, seven hundred thirty-seven thousand, six hundred forty".