20954830 has 32 divisors (see below), whose sum is σ = 40824000. Its totient is φ = 7698432.

The previous prime is 20954827. The next prime is 20954861. The reversal of 20954830 is 3845902.

It is a junction number, because it is equal to n+sod(n) for n = 20954792 and 20954801.

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, 46446 + ... + 46894.

It is an arithmetic number, because the mean of its divisors is an integer number (1275750).

Almost surely, 2^20954830 is an apocalyptic number.

20954830 is a deficient number, since it is larger than the sum of its proper divisors (19869170).

20954830 is a wasteful number, since it uses less digits than its factorization.

20954830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20954830 is about 4577.6445908349. The cubic root of 20954830 is about 275.6944651572.

The spelling of 20954830 in words is "twenty million, nine hundred fifty-four thousand, eight hundred thirty".