20787291626 has 8 divisors (see below), whose sum is σ = 31281198624. Its totient is φ = 10360225420.

The previous prime is 20787291619. The next prime is 20787291631. The reversal of 20787291626 is 62619278702.

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

It is a super-2 number, since 2×20787291626² (a number of 21 digits) contains 22 as substring.

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, 16709420 + ... + 16710663.

It is an arithmetic number, because the mean of its divisors is an integer number (3910149828).

Almost surely, 2^20787291626 is an apocalyptic number.

20787291626 is a deficient number, since it is larger than the sum of its proper divisors (10493906998).

20787291626 is a wasteful number, since it uses less digits than its factorization.

20787291626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33420396.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 20787291626 in words is "twenty billion, seven hundred eighty-seven million, two hundred ninety-one thousand, six hundred twenty-six".