20706051 has 16 divisors (see below), whose sum is σ = 30024864. Its totient is φ = 12639744.

The previous prime is 20706031. The next prime is 20706061. The reversal of 20706051 is 15060702.

It is not a de Polignac number, because 20706051 - 2⁵ = 20706019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20706031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3600 + ... + 7373.

It is an arithmetic number, because the mean of its divisors is an integer number (1876554).

Almost surely, 2^20706051 is an apocalyptic number.

20706051 is a deficient number, since it is larger than the sum of its proper divisors (9318813).

20706051 is a wasteful number, since it uses less digits than its factorization.

20706051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11030.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20706051 is about 4550.3902030485. The cubic root of 20706051 is about 274.5990896437.

Adding to 20706051 its reverse (15060702), we get a palindrome (35766753).

The spelling of 20706051 in words is "twenty million, seven hundred six thousand, fifty-one".