20470532340 has 48 divisors (see below), whose sum is σ = 57335060160. Its totient is φ = 5457135360.

The previous prime is 20470532321. The next prime is 20470532387. The reversal of 20470532340 is 4323507402.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20470532298 and 20470532307.

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, 151656 + ... + 252864.

It is an arithmetic number, because the mean of its divisors is an integer number (1194480420).

Almost surely, 2^20470532340 is an apocalyptic number.

20470532340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20470532340 is an abundant number, since it is smaller than the sum of its proper divisors (36864527820).

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

20470532340 is a wasteful number, since it uses less digits than its factorization.

20470532340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104592 (or 104590 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 30.

The spelling of 20470532340 in words is "twenty billion, four hundred seventy million, five hundred thirty-two thousand, three hundred forty".