20555656534 has 8 divisors (see below), whose sum is σ = 35238268368. Its totient is φ = 8809567080.

The previous prime is 20555656529. The next prime is 20555656549. The reversal of 20555656534 is 43565655502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 734130577 + ... + 734130604.

It is an arithmetic number, because the mean of its divisors is an integer number (4404783546).

Almost surely, 2^20555656534 is an apocalyptic number.

20555656534 is a deficient number, since it is larger than the sum of its proper divisors (14682611834).

20555656534 is a wasteful number, since it uses less digits than its factorization.

20555656534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468261190.

The product of its (nonzero) digits is 2700000, while the sum is 46.

The spelling of 20555656534 in words is "twenty billion, five hundred fifty-five million, six hundred fifty-six thousand, five hundred thirty-four".