20674520 has 32 divisors (see below), whose sum is σ = 48021120. Its totient is φ = 8002560.

The previous prime is 20674519. The next prime is 20674523. The reversal of 20674520 is 2547602.

It is a self number, because there is not a number n which added to its sum of digits gives 20674520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20674523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7097 + ... + 9576.

It is an arithmetic number, because the mean of its divisors is an integer number (1500660).

Almost surely, 2^20674520 is an apocalyptic number.

20674520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20674520 is an abundant number, since it is smaller than the sum of its proper divisors (27346600).

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

20674520 is a wasteful number, since it uses less digits than its factorization.

20674520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16715 (or 16711 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 20674520 is about 4546.9242351286. The cubic root of 20674520 is about 274.4596331053.

The spelling of 20674520 in words is "twenty million, six hundred seventy-four thousand, five hundred twenty".