20661288034 has 16 divisors (see below), whose sum is σ = 31064443200. Its totient is φ = 10306503504.

The previous prime is 20661288029. The next prime is 20661288049. The reversal of 20661288034 is 43088216602.

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, 1563547 + ... + 1576705.

It is an arithmetic number, because the mean of its divisors is an integer number (1941527700).

Almost surely, 2^20661288034 is an apocalyptic number.

20661288034 is a deficient number, since it is larger than the sum of its proper divisors (10403155166).

20661288034 is a wasteful number, since it uses less digits than its factorization.

20661288034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14937.

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 20661288034 in words is "twenty billion, six hundred sixty-one million, two hundred eighty-eight thousand, thirty-four".