20212055340 has 24 divisors (see below), whose sum is σ = 56593755120. Its totient is φ = 5389881408.

The previous prime is 20212055329. The next prime is 20212055351. The reversal of 20212055340 is 4355021202.

It is an interprime number because it is at equal distance from previous prime (20212055329) and next prime (20212055351).

It is a self number, because there is not a number n which added to its sum of digits gives 20212055340.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168433735 + ... + 168433854.

It is an arithmetic number, because the mean of its divisors is an integer number (2358073130).

Almost surely, 2^20212055340 is an apocalyptic number.

20212055340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212055340 is an abundant number, since it is smaller than the sum of its proper divisors (36381699780).

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

20212055340 is a wasteful number, since it uses less digits than its factorization.

20212055340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336867601 (or 336867599 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 20212055340 its reverse (4355021202), we get a palindrome (24567076542).

The spelling of 20212055340 in words is "twenty billion, two hundred twelve million, fifty-five thousand, three hundred forty".