20629349406772 has 6 divisors (see below), whose sum is σ = 36101361461858. Its totient is φ = 10314674703384.

The previous prime is 20629349406761. The next prime is 20629349406793. The reversal of 20629349406772 is 27760494392602.

It can be written as a sum of positive squares in only one way, i.e., 18554349490576 + 2074999916196 = 4307476^2 + 1440486^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20629349406772.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2578668675843 + ... + 2578668675850.

Almost surely, 2^{20629349406772} is an apocalyptic number.

It is an amenable number.

20629349406772 is a deficient number, since it is larger than the sum of its proper divisors (15472012055086).

20629349406772 is a wasteful number, since it uses less digits than its factorization.

20629349406772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5157337351697 (or 5157337351695 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 61.

The spelling of 20629349406772 in words is "twenty trillion, six hundred twenty-nine billion, three hundred forty-nine million, four hundred six thousand, seven hundred seventy-two".