20520948 has 24 divisors (see below), whose sum is σ = 54722752. Its totient is φ = 5863104.

The previous prime is 20520943. The next prime is 20520953. The reversal of 20520948 is 84902502.

It is an interprime number because it is at equal distance from previous prime (20520943) and next prime (20520953).

It is a super-2 number, since 2×20520948² = 842218613637408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20520943) 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, 122065 + ... + 122232.

Almost surely, 2^20520948 is an apocalyptic number.

20520948 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20520948 is an abundant number, since it is smaller than the sum of its proper divisors (34201804).

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

20520948 is a wasteful number, since it uses less digits than its factorization.

20520948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244311 (or 244309 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 20520948 is about 4530.0052980101. The cubic root of 20520948 is about 273.7783740736.

The spelling of 20520948 in words is "twenty million, five hundred twenty thousand, nine hundred forty-eight".