20171754040 has 32 divisors (see below), whose sum is σ = 45392698080. Its totient is φ = 8067590272.

The previous prime is 20171754013. The next prime is 20171754059. The reversal of 20171754040 is 4045717102.

It is a super-2 number, since 2×20171754040² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20171753993 and 20171754011.

It is a congruent number.

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, 298869 + ... + 360091.

It is an arithmetic number, because the mean of its divisors is an integer number (1418521815).

Almost surely, 2^20171754040 is an apocalyptic number.

20171754040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20171754040 is an abundant number, since it is smaller than the sum of its proper divisors (25220944040).

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

20171754040 is a wasteful number, since it uses less digits than its factorization.

20171754040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69471 (or 69467 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The spelling of 20171754040 in words is "twenty billion, one hundred seventy-one million, seven hundred fifty-four thousand, forty".