20651655126 has 32 divisors (see below), whose sum is σ = 41869312128. Its totient is φ = 6789823040.

The previous prime is 20651655119. The next prime is 20651655149. The reversal of 20651655126 is 62155615602.

It is a happy number.

It is a Curzon number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273661 + ... + 340871.

It is an arithmetic number, because the mean of its divisors is an integer number (1308416004).

Almost surely, 2^20651655126 is an apocalyptic number.

20651655126 is an abundant number, since it is smaller than the sum of its proper divisors (21217657002).

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

20651655126 is a wasteful number, since it uses less digits than its factorization.

20651655126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67916.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 20651655126 in words is "twenty billion, six hundred fifty-one million, six hundred fifty-five thousand, one hundred twenty-six".