20556174652 has 24 divisors (see below), whose sum is σ = 40424854176. Its totient is φ = 9074966208.

The previous prime is 20556174649. The next prime is 20556174671. The reversal of 20556174652 is 25647165502.

It is a super-2 number, since 2×20556174652² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20556174599 and 20556174608.

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, 8592523 + ... + 8594914.

It is an arithmetic number, because the mean of its divisors is an integer number (1684368924).

Almost surely, 2^20556174652 is an apocalyptic number.

It is an amenable number.

20556174652 is a deficient number, since it is larger than the sum of its proper divisors (19868679524).

20556174652 is a wasteful number, since it uses less digits than its factorization.

20556174652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17187477 (or 17187475 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 20556174652 in words is "twenty billion, five hundred fifty-six million, one hundred seventy-four thousand, six hundred fifty-two".