20985502970414 has 4 divisors (see below), whose sum is σ = 31478254455624. Its totient is φ = 10492751485206.

The previous prime is 20985502970387. The next prime is 20985502970429. The reversal of 20985502970414 is 41407920558902.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20985502970414.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5246375742602 + ... + 5246375742605.

It is an arithmetic number, because the mean of its divisors is an integer number (7869563613906).

Almost surely, 2^{20985502970414} is an apocalyptic number.

20985502970414 is a deficient number, since it is larger than the sum of its proper divisors (10492751485210).

20985502970414 is a wasteful number, since it uses less digits than its factorization.

20985502970414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10492751485209.

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 20985502970414 in words is "twenty trillion, nine hundred eighty-five billion, five hundred two million, nine hundred seventy thousand, four hundred fourteen".