20606015640040 has 32 divisors (see below), whose sum is σ = 48379341070080. Its totient is φ = 7884040766272.

The previous prime is 20606015639953. The next prime is 20606015640053. The reversal of 20606015640040 is 4004651060602.

It is a junction number, because it is equal to n+sod(n) for n = 20606015639978 and 20606015640005.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11198920624 + ... + 11198922463.

It is an arithmetic number, because the mean of its divisors is an integer number (1511854408440).

Almost surely, 2^{20606015640040} is an apocalyptic number.

20606015640040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20606015640040 is an abundant number, since it is smaller than the sum of its proper divisors (27773325430040).

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

20606015640040 is a wasteful number, since it uses less digits than its factorization.

20606015640040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22397843121 (or 22397843117 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 20606015640040 in words is "twenty trillion, six hundred six billion, fifteen million, six hundred forty thousand, forty".