20412121440 has 96 divisors (see below), whose sum is σ = 65388072960. Its totient is φ = 5350966784.

The previous prime is 20412121369. The next prime is 20412121469. The reversal of 20412121440 is 4412121402.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332064 + ... + 388703.

It is an arithmetic number, because the mean of its divisors is an integer number (681125760).

Almost surely, 2^20412121440 is an apocalyptic number.

20412121440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20412121440 is an abundant number, since it is smaller than the sum of its proper divisors (44975951520).

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

20412121440 is a wasteful number, since it uses less digits than its factorization.

20412121440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720844 (or 720836 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20412121440 its reverse (4412121402), we get a palindrome (24824242842).

The spelling of 20412121440 in words is "twenty billion, four hundred twelve million, one hundred twenty-one thousand, four hundred forty".