20980470 has 32 divisors (see below), whose sum is σ = 57547008. Its totient is φ = 4795488.

The previous prime is 20980469. The next prime is 20980481. The reversal of 20980470 is 7408902.

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

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, 49744 + ... + 50163.

It is an arithmetic number, because the mean of its divisors is an integer number (1798344).

Almost surely, 2^20980470 is an apocalyptic number.

20980470 is an abundant number, since it is smaller than the sum of its proper divisors (36566538).

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

20980470 is a wasteful number, since it uses less digits than its factorization.

20980470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99924.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 20980470 is about 4580.4443015935. Note that the first 3 decimals coincide. The cubic root of 20980470 is about 275.8068644617.

The spelling of 20980470 in words is "twenty million, nine hundred eighty thousand, four hundred seventy".