20147340 has 48 divisors (see below), whose sum is σ = 56619360. Its totient is φ = 5352960.

The previous prime is 20147327. The next prime is 20147341. The reversal of 20147340 is 4374102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20147341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24130 + ... + 24950.

It is an arithmetic number, because the mean of its divisors is an integer number (1179570).

Almost surely, 2^20147340 is an apocalyptic number.

20147340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20147340 is an abundant number, since it is smaller than the sum of its proper divisors (36472020).

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

20147340 is a wasteful number, since it uses less digits than its factorization.

20147340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242 (or 1240 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20147340 is about 4488.5788396774. The cubic root of 20147340 is about 272.1067019373.

The spelling of 20147340 in words is "twenty million, one hundred forty-seven thousand, three hundred forty".