2021955109464 has 64 divisors (see below), whose sum is σ = 5173335129600. Its totient is φ = 658197461376.

The previous prime is 2021955109459. The next prime is 2021955109469. The reversal of 2021955109464 is 4649015591202.

It is an interprime number because it is at equal distance from previous prime (2021955109459) and next prime (2021955109469).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021955109469) 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, 5925942 + ... + 6257850.

It is an arithmetic number, because the mean of its divisors is an integer number (80833361400).

Almost surely, 2^{2021955109464} is an apocalyptic number.

2021955109464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2021955109464 is an abundant number, since it is smaller than the sum of its proper divisors (3151380020136).

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

2021955109464 is a wasteful number, since it uses less digits than its factorization.

2021955109464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337864 (or 337860 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 2021955109464 in words is "two trillion, twenty-one billion, nine hundred fifty-five million, one hundred nine thousand, four hundred sixty-four".