20467744340 has 24 divisors (see below), whose sum is σ = 42984950400. Its totient is φ = 8186585888.

The previous prime is 20467744291. The next prime is 20467744369. The reversal of 20467744340 is 4344776402.

It is a congruent number.

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, 619889 + ... + 652071.

It is an arithmetic number, because the mean of its divisors is an integer number (1791039600).

Almost surely, 2^20467744340 is an apocalyptic number.

20467744340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20467744340 is an abundant number, since it is smaller than the sum of its proper divisors (22517206060).

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

20467744340 is a wasteful number, since it uses less digits than its factorization.

20467744340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63991 (or 63989 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 41.

The spelling of 20467744340 in words is "twenty billion, four hundred sixty-seven million, seven hundred forty-four thousand, three hundred forty".