20513352 has 32 divisors (see below), whose sum is σ = 51400800. Its totient is φ = 6822144.

The previous prime is 20513341. The next prime is 20513371. The reversal of 20513352 is 25331502.

It is a super-2 number, since 2×20513352² = 841595220551808, which contains 22 as substring.

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, 15168 + ... + 16464.

It is an arithmetic number, because the mean of its divisors is an integer number (1606275).

Almost surely, 2^20513352 is an apocalyptic number.

It is an amenable number.

20513352 is an abundant number, since it is smaller than the sum of its proper divisors (30887448).

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

20513352 is a wasteful number, since it uses less digits than its factorization.

20513352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965 (or 1961 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 20513352 is about 4529.1668107942. The cubic root of 20513352 is about 273.7445894554.

Adding to 20513352 its reverse (25331502), we get a palindrome (45844854).

The spelling of 20513352 in words is "twenty million, five hundred thirteen thousand, three hundred fifty-two".