20002000021950 has 48 divisors (see below), whose sum is σ = 49649689917360. Its totient is φ = 5329057009920.

The previous prime is 20002000021943. The next prime is 20002000021951. The reversal of 20002000021950 is 5912000020002.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002000021951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59953879 + ... + 60286578.

It is an arithmetic number, because the mean of its divisors is an integer number (1034368539945).

Almost surely, 2^{20002000021950} is an apocalyptic number.

20002000021950 is an abundant number, since it is smaller than the sum of its proper divisors (29647689895410).

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

20002000021950 is a wasteful number, since it uses less digits than its factorization.

20002000021950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120241581 (or 120241576 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 20002000021950 its reverse (5912000020002), we get a palindrome (25914000041952).

The spelling of 20002000021950 in words is "twenty trillion, two billion, twenty-one thousand, nine hundred fifty".