20309577620229 has 16 divisors (see below), whose sum is σ = 31396448496000. Its totient is φ = 12951035003808.

The previous prime is 20309577620201. The next prime is 20309577620231. The reversal of 20309577620229 is 92202677590302.

20309577620229 is a `hidden beast` number, since 2 + 0 + 3 + 0 + 9 + 5 + 7 + 7 + 620 + 2 + 2 + 9 = 666.

It is not a de Polignac number, because 20309577620229 - 2⁵ = 20309577620197 is a prime.

It is a super-2 number, since 2×20309577620229² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20309577620929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16352316304 + ... + 16352317545.

It is an arithmetic number, because the mean of its divisors is an integer number (1962278031000).

Almost surely, 2^{20309577620229} is an apocalyptic number.

It is an amenable number.

20309577620229 is a deficient number, since it is larger than the sum of its proper divisors (11086870875771).

20309577620229 is a wasteful number, since it uses less digits than its factorization.

20309577620229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32704633881 (or 32704633875 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 54.

The spelling of 20309577620229 in words is "twenty trillion, three hundred nine billion, five hundred seventy-seven million, six hundred twenty thousand, two hundred twenty-nine".