20212245040 has 40 divisors (see below), whose sum is σ = 50608354608. Its totient is φ = 7462982400.

The previous prime is 20212245017. The next prime is 20212245061. The reversal of 20212245040 is 4054221202.

It is a tau number, because it is divible by the number of its divisors (40).

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, 9716386 + ... + 9718465.

Almost surely, 2^20212245040 is an apocalyptic number.

20212245040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212245040 is an abundant number, since it is smaller than the sum of its proper divisors (30396109568).

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

20212245040 is a wasteful number, since it uses less digits than its factorization.

20212245040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19434877 (or 19434871 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 20212245040 its reverse (4054221202), we get a palindrome (24266466242).

The spelling of 20212245040 in words is "twenty billion, two hundred twelve million, two hundred forty-five thousand, forty".