20770842040 has 64 divisors (see below), whose sum is σ = 51279026400. Its totient is φ = 7524521472.

The previous prime is 20770842019. The next prime is 20770842067. The reversal of 20770842040 is 4024807702.

It is a junction number, because it is equal to n+sod(n) for n = 20770841987 and 20770842005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349270 + ... + 404389.

Almost surely, 2^20770842040 is an apocalyptic number.

20770842040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20770842040 is an abundant number, since it is smaller than the sum of its proper divisors (30508184360).

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

20770842040 is a wasteful number, since it uses less digits than its factorization.

20770842040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753736 (or 753732 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 34.

The spelling of 20770842040 in words is "twenty billion, seven hundred seventy million, eight hundred forty-two thousand, forty".