20399970696960 has 144 divisors (see below), whose sum is σ = 65154782085120. Its totient is φ = 5439793827840.

The previous prime is 20399970696907. The next prime is 20399970696961. The reversal of 20399970696960 is 6969607999302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20399970696961) 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, 126912321 + ... + 127072959.

It is an arithmetic number, because the mean of its divisors is an integer number (452463764480).

Almost surely, 2^{20399970696960} is an apocalyptic number.

20399970696960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20399970696960 is an abundant number, since it is smaller than the sum of its proper divisors (44754811388160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20399970696960 is a wasteful number, since it uses less digits than its factorization.

20399970696960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193734 (or 193720 counting only the distinct ones).

The product of its (nonzero) digits is 535692528, while the sum is 75.

The spelling of 20399970696960 in words is "twenty trillion, three hundred ninety-nine billion, nine hundred seventy million, six hundred ninety-six thousand, nine hundred sixty".