20257770752740 has 24 divisors (see below), whose sum is σ = 44008260602040. Its totient is φ = 7823690773248.

The previous prime is 20257770752731. The next prime is 20257770752759. The reversal of 20257770752740 is 4725707775202.

It can be written as a sum of positive squares in 4 ways, for example, as 1172685404836 + 19085085347904 = 1082906^2 + 4368648^2 .

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, 17463594897 + ... + 17463596056.

It is an arithmetic number, because the mean of its divisors is an integer number (1833677525085).

Almost surely, 2^{20257770752740} is an apocalyptic number.

20257770752740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20257770752740 is an abundant number, since it is smaller than the sum of its proper divisors (23750489849300).

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

20257770752740 is a wasteful number, since it uses less digits than its factorization.

20257770752740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34927190991 (or 34927190989 counting only the distinct ones).

The product of its (nonzero) digits is 13445600, while the sum is 55.

The spelling of 20257770752740 in words is "twenty trillion, two hundred fifty-seven billion, seven hundred seventy million, seven hundred fifty-two thousand, seven hundred forty".