20951130 has 16 divisors (see below), whose sum is σ = 50282784. Its totient is φ = 5586960.

The previous prime is 20951107. The next prime is 20951131. The reversal of 20951130 is 3115902.

It is a junction number, because it is equal to n+sod(n) for n = 20951097 and 20951106.

It is not an unprimeable number, because it can be changed into a prime (20951131) 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, 349156 + ... + 349215.

It is an arithmetic number, because the mean of its divisors is an integer number (3142674).

Almost surely, 2^20951130 is an apocalyptic number.

20951130 is an abundant number, since it is smaller than the sum of its proper divisors (29331654).

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

20951130 is a wasteful number, since it uses less digits than its factorization.

20951130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698381.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 20951130 is about 4577.2404350220. The cubic root of 20951130 is about 275.6782377200.

The spelling of 20951130 in words is "twenty million, nine hundred fifty-one thousand, one hundred thirty".